UI tweaks

app/Settings.cs

@@ -471,11 +471,8 @@ namespace GHelper
 
         public void SetVersionLabel(string label, bool update = false)
         {
-            Invoke(delegate
-            {
-                labelVersion.Text = label;
-                if (update) labelVersion.ForeColor = colorTurbo;
-            });
+            labelVersion.Text = label;
+            if (update) labelVersion.ForeColor = colorTurbo;
         }
 
 
@@ -659,18 +656,12 @@ namespace GHelper
 
         public void FansInit()
         {
-            Invoke(delegate
-            {
-                if (fansForm != null && fansForm.Text != "") fansForm.InitAll();
-            });
+            if (fansForm != null && fansForm.Text != "") fansForm.InitAll();
         }
 
         public void GPUInit()
         {
-            Invoke(delegate
-            {
-                if (fansForm != null && fansForm.Text != "") fansForm.InitGPU();
-            });
+            if (fansForm != null && fansForm.Text != "") fansForm.InitGPU();
         }
 
         public void FansToggle(int index = 0)
@@ -764,12 +755,9 @@ namespace GHelper
 
         public void VisualiseAura()
         {
-            Invoke(delegate
-            {
-                pictureColor.BackColor = Aura.Color1;
-                pictureColor2.BackColor = Aura.Color2;
-                pictureColor2.Visible = Aura.HasSecondColor();
-            });
+            pictureColor.BackColor = Aura.Color1;
+            pictureColor2.BackColor = Aura.Color2;
+            pictureColor2.Visible = Aura.HasSecondColor();
         }
 
         public void InitMatrix()
@@ -1001,18 +989,19 @@ namespace GHelper
             if (gpuTemp.Length > 0) trayTip += "\nGPU" + gpuTemp + " " + HardwareControl.gpuFan;
             if (battery.Length > 0) trayTip += "\n" + battery;
 
-            Program.settingsForm.BeginInvoke(delegate
-            {
-                labelCPUFan.Text = "CPU" + cpuTemp + " " + HardwareControl.cpuFan;
-                labelGPUFan.Text = "GPU" + gpuTemp + " " + HardwareControl.gpuFan;
-                if (HardwareControl.midFan is not null)
-                    labelMidFan.Text = "Mid " + HardwareControl.midFan;
+            if (Program.settingsForm.IsHandleCreated)
+                Program.settingsForm.BeginInvoke(delegate
+                {
+                    labelCPUFan.Text = "CPU" + cpuTemp + " " + HardwareControl.cpuFan;
+                    labelGPUFan.Text = "GPU" + gpuTemp + " " + HardwareControl.gpuFan;
+                    if (HardwareControl.midFan is not null)
+                        labelMidFan.Text = "Mid " + HardwareControl.midFan;
 
-                labelBattery.Text = battery;
-                if (!batteryMouseOver && !batteryFullMouseOver) labelCharge.Text = charge;
+                    labelBattery.Text = battery;
+                    if (!batteryMouseOver && !batteryFullMouseOver) labelCharge.Text = charge;
 
-                //panelPerformance.AccessibleName = labelPerf.Text + " " + trayTip;
-            });
+                    //panelPerformance.AccessibleName = labelPerf.Text + " " + trayTip;
+                });
 
 
             Program.trayIcon.Text = trayTip;
@@ -1027,52 +1016,56 @@ namespace GHelper
 
         public void ShowMode(int mode)
         {
-            Invoke(delegate
+            buttonSilent.Activated = false;
+            buttonBalanced.Activated = false;
+            buttonTurbo.Activated = false;
+            buttonFans.Activated = false;
+
+            menuSilent.Checked = false;
+            menuBalanced.Checked = false;
+            menuTurbo.Checked = false;
+
+            switch (mode)
             {
-                buttonSilent.Activated = false;
-                buttonBalanced.Activated = false;
-                buttonTurbo.Activated = false;
-                buttonFans.Activated = false;
-
-                menuSilent.Checked = false;
-                menuBalanced.Checked = false;
-                menuTurbo.Checked = false;
-
-                switch (mode)
-                {
-                    case AsusACPI.PerformanceSilent:
-                        buttonSilent.Activated = true;
-                        menuSilent.Checked = true;
-                        break;
-                    case AsusACPI.PerformanceTurbo:
-                        buttonTurbo.Activated = true;
-                        menuTurbo.Checked = true;
-                        break;
-                    case AsusACPI.PerformanceBalanced:
-                        buttonBalanced.Activated = true;
-                        menuBalanced.Checked = true;
-                        break;
-                    default:
-                        buttonFans.Activated = true;
-                        buttonFans.BorderColor = Modes.GetBase(mode) switch
-                        {
-                            AsusACPI.PerformanceSilent => colorEco,
-                            AsusACPI.PerformanceTurbo => colorTurbo,
-                            _ => colorStandard,
-                        };
-                        break;
-                }
-            });
+                case AsusACPI.PerformanceSilent:
+                    buttonSilent.Activated = true;
+                    menuSilent.Checked = true;
+                    break;
+                case AsusACPI.PerformanceTurbo:
+                    buttonTurbo.Activated = true;
+                    menuTurbo.Checked = true;
+                    break;
+                case AsusACPI.PerformanceBalanced:
+                    buttonBalanced.Activated = true;
+                    menuBalanced.Checked = true;
+                    break;
+                default:
+                    buttonFans.Activated = true;
+                    buttonFans.BorderColor = Modes.GetBase(mode) switch
+                    {
+                        AsusACPI.PerformanceSilent => colorEco,
+                        AsusACPI.PerformanceTurbo => colorTurbo,
+                        _ => colorStandard,
+                    };
+                    break;
+            }
         }
 
 
         public void SetModeLabel(string modeText)
         {
-            Invoke(delegate
+            if (InvokeRequired)
+            {
+                Invoke(delegate { 
+                    labelPerf.Text = modeText;
+                    panelPerformance.AccessibleName = labelPerf.Text;
+                });
+            } else
             {
                 labelPerf.Text = modeText;
                 panelPerformance.AccessibleName = labelPerf.Text;
-            });
+            }
+
         }
 
 

app/UI/ControlHelper.cs

@@ -50,6 +50,9 @@ public static class ControlHelper
     {
         foreach (Control control in controls)
         {
+
+            AdjustControls(control.Controls);
+
             var button = control as RButton;
             if (button != null)
             {
@@ -132,7 +135,6 @@ public static class ControlHelper
 
             }
 
-            AdjustControls(control.Controls);
         }
     }
 

app/UI/CustomControls.cs

@@ -1,6 +1,4 @@
 using Microsoft.Win32;
-using System.ComponentModel;
-using System.Drawing.Drawing2D;
 using System.Runtime.InteropServices;
 
 namespace GHelper.UI
@@ -108,308 +106,4 @@ namespace GHelper.UI
         }
 
     }
-
-
-    public class RCheckBox : CheckBox
-    {
-
-    }
-
-
-    public class RComboBox : ComboBox
-    {
-        private Color borderColor = Color.Gray;
-        [DefaultValue(typeof(Color), "Gray")]
-        public Color BorderColor
-        {
-            get { return borderColor; }
-            set
-            {
-                if (borderColor != value)
-                {
-                    borderColor = value;
-                    Invalidate();
-                }
-            }
-        }
-
-
-        private Color buttonColor = Color.FromArgb(255, 255, 255, 255);
-        [DefaultValue(typeof(Color), "255, 255, 255")]
-        public Color ButtonColor
-        {
-            get { return buttonColor; }
-            set
-            {
-                if (buttonColor != value)
-                {
-                    buttonColor = value;
-                    Invalidate();
-                }
-            }
-        }
-
-        private Color arrowColor = Color.Black;
-        [DefaultValue(typeof(Color), "Black")]
-        public Color ArrowColor
-        {
-            get { return arrowColor; }
-            set
-            {
-                if (arrowColor != value)
-                {
-                    arrowColor = value;
-                    Invalidate();
-                }
-            }
-        }
-
-
-        protected override void WndProc(ref Message m)
-        {
-            if (m.Msg == WM_PAINT && DropDownStyle != ComboBoxStyle.Simple)
-            {
-                var clientRect = ClientRectangle;
-                var dropDownButtonWidth = SystemInformation.HorizontalScrollBarArrowWidth;
-                var outerBorder = new Rectangle(clientRect.Location,
-                    new Size(clientRect.Width - 1, clientRect.Height - 1));
-                var innerBorder = new Rectangle(outerBorder.X + 1, outerBorder.Y + 1,
-                    outerBorder.Width - dropDownButtonWidth - 2, outerBorder.Height - 2);
-                var innerInnerBorder = new Rectangle(innerBorder.X + 1, innerBorder.Y + 1,
-                    innerBorder.Width - 2, innerBorder.Height - 2);
-                var dropDownRect = new Rectangle(innerBorder.Right + 1, innerBorder.Y,
-                    dropDownButtonWidth, innerBorder.Height + 1);
-                if (RightToLeft == RightToLeft.Yes)
-                {
-                    innerBorder.X = clientRect.Width - innerBorder.Right;
-                    innerInnerBorder.X = clientRect.Width - innerInnerBorder.Right;
-                    dropDownRect.X = clientRect.Width - dropDownRect.Right;
-                    dropDownRect.Width += 1;
-                }
-                var innerBorderColor = Enabled ? BackColor : SystemColors.Control;
-                var outerBorderColor = Enabled ? BorderColor : SystemColors.ControlDark;
-                var buttonColor = Enabled ? ButtonColor : SystemColors.Control;
-                var middle = new Point(dropDownRect.Left + dropDownRect.Width / 2,
-                    dropDownRect.Top + dropDownRect.Height / 2);
-                var arrow = new Point[]
-                {
-                new Point(middle.X - 3, middle.Y - 2),
-                new Point(middle.X + 4, middle.Y - 2),
-                new Point(middle.X, middle.Y + 2)
-                };
-                var ps = new PAINTSTRUCT();
-                bool shoulEndPaint = false;
-                nint dc;
-                if (m.WParam == nint.Zero)
-                {
-                    dc = BeginPaint(Handle, ref ps);
-                    m.WParam = dc;
-                    shoulEndPaint = true;
-                }
-                else
-                {
-                    dc = m.WParam;
-                }
-
-                var rgn = CreateRectRgn(innerInnerBorder.Left, innerInnerBorder.Top,
-                    innerInnerBorder.Right, innerInnerBorder.Bottom);
-
-                SelectClipRgn(dc, rgn);
-                DefWndProc(ref m);
-                DeleteObject(rgn);
-                rgn = CreateRectRgn(clientRect.Left, clientRect.Top,
-                    clientRect.Right, clientRect.Bottom);
-                SelectClipRgn(dc, rgn);
-                using (var g = Graphics.FromHdc(dc))
-                {
-                    using (var b = new SolidBrush(buttonColor))
-                    {
-                        g.FillRectangle(b, dropDownRect);
-                    }
-                    using (var b = new SolidBrush(arrowColor))
-                    {
-                        g.FillPolygon(b, arrow);
-                    }
-                    using (var p = new Pen(innerBorderColor))
-                    {
-                        g.DrawRectangle(p, innerBorder);
-                        g.DrawRectangle(p, innerInnerBorder);
-                    }
-                    using (var p = new Pen(outerBorderColor))
-                    {
-                        g.DrawRectangle(p, outerBorder);
-                    }
-                }
-                if (shoulEndPaint)
-                    EndPaint(Handle, ref ps);
-                DeleteObject(rgn);
-            }
-            else
-                base.WndProc(ref m);
-        }
-
-        private const int WM_PAINT = 0xF;
-        [StructLayout(LayoutKind.Sequential)]
-        public struct RECT
-        {
-            public int L, T, R, B;
-        }
-        [StructLayout(LayoutKind.Sequential)]
-        public struct PAINTSTRUCT
-        {
-            public nint hdc;
-            public bool fErase;
-            public int rcPaint_left;
-            public int rcPaint_top;
-            public int rcPaint_right;
-            public int rcPaint_bottom;
-            public bool fRestore;
-            public bool fIncUpdate;
-            public int reserved1;
-            public int reserved2;
-            public int reserved3;
-            public int reserved4;
-            public int reserved5;
-            public int reserved6;
-            public int reserved7;
-            public int reserved8;
-        }
-        [DllImport("user32.dll")]
-        private static extern nint BeginPaint(nint hWnd,
-            [In, Out] ref PAINTSTRUCT lpPaint);
-
-        [DllImport("user32.dll")]
-        private static extern bool EndPaint(nint hWnd, ref PAINTSTRUCT lpPaint);
-
-        [DllImport("gdi32.dll")]
-        public static extern int SelectClipRgn(nint hDC, nint hRgn);
-
-        [DllImport("user32.dll")]
-        public static extern int GetUpdateRgn(nint hwnd, nint hrgn, bool fErase);
-        public enum RegionFlags
-        {
-            ERROR = 0,
-            NULLREGION = 1,
-            SIMPLEREGION = 2,
-            COMPLEXREGION = 3,
-        }
-        [DllImport("gdi32.dll")]
-        internal static extern bool DeleteObject(nint hObject);
-
-        [DllImport("gdi32.dll")]
-        private static extern nint CreateRectRgn(int x1, int y1, int x2, int y2);
-    }
-
-    public class RButton : Button
-    {
-        //Fields
-        private int borderSize = 5;
-
-        private int borderRadius = 5;
-        public int BorderRadius
-        {
-            get { return borderRadius; }
-            set
-            {
-                borderRadius = value;
-            }
-        }
-
-        private Color borderColor = Color.Transparent;
-        public Color BorderColor
-        {
-            get { return borderColor; }
-            set
-            {
-                borderColor = value;
-            }
-        }
-
-
-        private bool activated = false;
-        public bool Activated
-        {
-            get { return activated; }
-            set
-            {
-                if (activated != value)
-                    Invalidate();
-                activated = value;
-
-            }
-        }
-
-        private bool secondary = false;
-        public bool Secondary
-        {
-            get { return secondary; }
-            set
-            {
-                secondary = value;
-            }
-        }
-
-        public RButton()
-        {
-            DoubleBuffered = true;
-            FlatStyle = FlatStyle.Flat;
-            FlatAppearance.BorderSize = 0;
-        }
-
-        private GraphicsPath GetFigurePath(Rectangle rect, int radius)
-        {
-            GraphicsPath path = new GraphicsPath();
-            float curveSize = radius * 2F;
-
-            path.StartFigure();
-            path.AddArc(rect.X, rect.Y, curveSize, curveSize, 180, 90);
-            path.AddArc(rect.Right - curveSize, rect.Y, curveSize, curveSize, 270, 90);
-            path.AddArc(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize, 0, 90);
-            path.AddArc(rect.X, rect.Bottom - curveSize, curveSize, curveSize, 90, 90);
-            path.CloseFigure();
-            return path;
-        }
-
-
-        protected override void OnPaint(PaintEventArgs pevent)
-        {
-
-            base.OnPaint(pevent);
-
-            float ratio = pevent.Graphics.DpiX / 192.0f;
-            int border = (int)(ratio * borderSize);
-
-            Rectangle rectSurface = ClientRectangle;
-            Rectangle rectBorder = Rectangle.Inflate(rectSurface, -border, -border);
-
-            Color borderDrawColor = activated ? borderColor : Color.Transparent;
-
-            using (GraphicsPath pathSurface = GetFigurePath(rectSurface, borderRadius + border))
-            using (GraphicsPath pathBorder = GetFigurePath(rectBorder, borderRadius))
-            using (Pen penSurface = new Pen(Parent.BackColor, border))
-            using (Pen penBorder = new Pen(borderDrawColor, border))
-            {
-                penBorder.Alignment = PenAlignment.Outset;
-                pevent.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
-                Region = new Region(pathSurface);
-                pevent.Graphics.DrawPath(penSurface, pathSurface);
-                pevent.Graphics.DrawPath(penBorder, pathBorder);
-            }
-
-            if (!Enabled && ForeColor != SystemColors.ControlText)
-            {
-                var rect = pevent.ClipRectangle;
-                if (Image is not null)
-                {
-                    rect.Y += Image.Height;
-                    rect.Height -= Image.Height;
-                }
-                TextFormatFlags flags = TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.WordBreak;
-                TextRenderer.DrawText(pevent.Graphics, Text, Font, rect, Color.Gray, flags);
-            }
-
-
-        }
-
-    }
 }

app/UI/RButton.cs

@@ -0,0 +1,117 @@
+using System.Drawing.Drawing2D;
+
+namespace GHelper.UI
+{
+    public class RButton : Button
+    {
+        //Fields
+        private int borderSize = 5;
+
+        private int borderRadius = 5;
+        public int BorderRadius
+        {
+            get { return borderRadius; }
+            set
+            {
+                borderRadius = value;
+            }
+        }
+
+        private Color borderColor = Color.Transparent;
+        public Color BorderColor
+        {
+            get { return borderColor; }
+            set
+            {
+                borderColor = value;
+            }
+        }
+
+
+        private bool activated = false;
+        public bool Activated
+        {
+            get { return activated; }
+            set
+            {
+                if (activated != value)
+                    Invalidate();
+                activated = value;
+
+            }
+        }
+
+        private bool secondary = false;
+        public bool Secondary
+        {
+            get { return secondary; }
+            set
+            {
+                secondary = value;
+            }
+        }
+
+        public RButton()
+        {
+            DoubleBuffered = true;
+            FlatStyle = FlatStyle.Flat;
+            FlatAppearance.BorderSize = 0;
+        }
+
+        private GraphicsPath GetFigurePath(Rectangle rect, int radius)
+        {
+            GraphicsPath path = new GraphicsPath();
+            float curveSize = radius * 2F;
+
+            path.StartFigure();
+            path.AddArc(rect.X, rect.Y, curveSize, curveSize, 180, 90);
+            path.AddArc(rect.Right - curveSize, rect.Y, curveSize, curveSize, 270, 90);
+            path.AddArc(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize, 0, 90);
+            path.AddArc(rect.X, rect.Bottom - curveSize, curveSize, curveSize, 90, 90);
+            path.CloseFigure();
+            return path;
+        }
+
+
+        protected override void OnPaint(PaintEventArgs pevent)
+        {
+
+            base.OnPaint(pevent);
+
+            float ratio = pevent.Graphics.DpiX / 192.0f;
+            int border = (int)(ratio * borderSize);
+
+            Rectangle rectSurface = ClientRectangle;
+            Rectangle rectBorder = Rectangle.Inflate(rectSurface, -border, -border);
+
+            Color borderDrawColor = activated ? borderColor : Color.Transparent;
+
+            using (GraphicsPath pathSurface = GetFigurePath(rectSurface, borderRadius + border))
+            using (GraphicsPath pathBorder = GetFigurePath(rectBorder, borderRadius))
+            using (Pen penSurface = new Pen(Parent.BackColor, border))
+            using (Pen penBorder = new Pen(borderDrawColor, border))
+            {
+                penBorder.Alignment = PenAlignment.Outset;
+                pevent.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                Region = new Region(pathSurface);
+                pevent.Graphics.DrawPath(penSurface, pathSurface);
+                pevent.Graphics.DrawPath(penBorder, pathBorder);
+            }
+
+            if (!Enabled && ForeColor != SystemColors.ControlText)
+            {
+                var rect = pevent.ClipRectangle;
+                if (Image is not null)
+                {
+                    rect.Y += Image.Height;
+                    rect.Height -= Image.Height;
+                }
+                TextFormatFlags flags = TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.WordBreak;
+                TextRenderer.DrawText(pevent.Graphics, Text, Font, rect, Color.Gray, flags);
+            }
+
+
+        }
+
+    }
+}

app/UI/RCheckBox.cs

@@ -0,0 +1,7 @@
+namespace GHelper.UI
+{
+    public class RCheckBox : CheckBox
+    {
+
+    }
+}

app/UI/RComboBox.cs

@@ -0,0 +1,189 @@
+using System.ComponentModel;
+using System.Runtime.InteropServices;
+
+namespace GHelper.UI
+{
+    public class RComboBox : ComboBox
+    {
+        private Color borderColor = Color.Gray;
+        [DefaultValue(typeof(Color), "Gray")]
+        public Color BorderColor
+        {
+            get { return borderColor; }
+            set
+            {
+                if (borderColor != value)
+                {
+                    borderColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+
+        private Color buttonColor = Color.FromArgb(255, 255, 255, 255);
+        [DefaultValue(typeof(Color), "255, 255, 255")]
+        public Color ButtonColor
+        {
+            get { return buttonColor; }
+            set
+            {
+                if (buttonColor != value)
+                {
+                    buttonColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+        private Color arrowColor = Color.Black;
+        [DefaultValue(typeof(Color), "Black")]
+        public Color ArrowColor
+        {
+            get { return arrowColor; }
+            set
+            {
+                if (arrowColor != value)
+                {
+                    arrowColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+
+        protected override void WndProc(ref Message m)
+        {
+            if (m.Msg == WM_PAINT && DropDownStyle != ComboBoxStyle.Simple)
+            {
+                var clientRect = ClientRectangle;
+                var dropDownButtonWidth = SystemInformation.HorizontalScrollBarArrowWidth;
+                var outerBorder = new Rectangle(clientRect.Location,
+                    new Size(clientRect.Width - 1, clientRect.Height - 1));
+                var innerBorder = new Rectangle(outerBorder.X + 1, outerBorder.Y + 1,
+                    outerBorder.Width - dropDownButtonWidth - 2, outerBorder.Height - 2);
+                var innerInnerBorder = new Rectangle(innerBorder.X + 1, innerBorder.Y + 1,
+                    innerBorder.Width - 2, innerBorder.Height - 2);
+                var dropDownRect = new Rectangle(innerBorder.Right + 1, innerBorder.Y,
+                    dropDownButtonWidth, innerBorder.Height + 1);
+                if (RightToLeft == RightToLeft.Yes)
+                {
+                    innerBorder.X = clientRect.Width - innerBorder.Right;
+                    innerInnerBorder.X = clientRect.Width - innerInnerBorder.Right;
+                    dropDownRect.X = clientRect.Width - dropDownRect.Right;
+                    dropDownRect.Width += 1;
+                }
+                var innerBorderColor = Enabled ? BackColor : SystemColors.Control;
+                var outerBorderColor = Enabled ? BorderColor : SystemColors.ControlDark;
+                var buttonColor = Enabled ? ButtonColor : SystemColors.Control;
+                var middle = new Point(dropDownRect.Left + dropDownRect.Width / 2,
+                    dropDownRect.Top + dropDownRect.Height / 2);
+                var arrow = new Point[]
+                {
+                new Point(middle.X - 3, middle.Y - 2),
+                new Point(middle.X + 4, middle.Y - 2),
+                new Point(middle.X, middle.Y + 2)
+                };
+                var ps = new PAINTSTRUCT();
+                bool shoulEndPaint = false;
+                nint dc;
+                if (m.WParam == nint.Zero)
+                {
+                    dc = BeginPaint(Handle, ref ps);
+                    m.WParam = dc;
+                    shoulEndPaint = true;
+                }
+                else
+                {
+                    dc = m.WParam;
+                }
+
+                var rgn = CreateRectRgn(innerInnerBorder.Left, innerInnerBorder.Top,
+                    innerInnerBorder.Right, innerInnerBorder.Bottom);
+
+                SelectClipRgn(dc, rgn);
+                DefWndProc(ref m);
+                DeleteObject(rgn);
+                rgn = CreateRectRgn(clientRect.Left, clientRect.Top,
+                    clientRect.Right, clientRect.Bottom);
+                SelectClipRgn(dc, rgn);
+                using (var g = Graphics.FromHdc(dc))
+                {
+                    using (var b = new SolidBrush(buttonColor))
+                    {
+                        g.FillRectangle(b, dropDownRect);
+                    }
+                    using (var b = new SolidBrush(arrowColor))
+                    {
+                        g.FillPolygon(b, arrow);
+                    }
+                    using (var p = new Pen(innerBorderColor))
+                    {
+                        g.DrawRectangle(p, innerBorder);
+                        g.DrawRectangle(p, innerInnerBorder);
+                    }
+                    using (var p = new Pen(outerBorderColor))
+                    {
+                        g.DrawRectangle(p, outerBorder);
+                    }
+                }
+                if (shoulEndPaint)
+                    EndPaint(Handle, ref ps);
+                DeleteObject(rgn);
+            }
+            else
+                base.WndProc(ref m);
+        }
+
+        private const int WM_PAINT = 0xF;
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RECT
+        {
+            public int L, T, R, B;
+        }
+        [StructLayout(LayoutKind.Sequential)]
+        public struct PAINTSTRUCT
+        {
+            public nint hdc;
+            public bool fErase;
+            public int rcPaint_left;
+            public int rcPaint_top;
+            public int rcPaint_right;
+            public int rcPaint_bottom;
+            public bool fRestore;
+            public bool fIncUpdate;
+            public int reserved1;
+            public int reserved2;
+            public int reserved3;
+            public int reserved4;
+            public int reserved5;
+            public int reserved6;
+            public int reserved7;
+            public int reserved8;
+        }
+        [DllImport("user32.dll")]
+        private static extern nint BeginPaint(nint hWnd,
+            [In, Out] ref PAINTSTRUCT lpPaint);
+
+        [DllImport("user32.dll")]
+        private static extern bool EndPaint(nint hWnd, ref PAINTSTRUCT lpPaint);
+
+        [DllImport("gdi32.dll")]
+        public static extern int SelectClipRgn(nint hDC, nint hRgn);
+
+        [DllImport("user32.dll")]
+        public static extern int GetUpdateRgn(nint hwnd, nint hrgn, bool fErase);
+        public enum RegionFlags
+        {
+            ERROR = 0,
+            NULLREGION = 1,
+            SIMPLEREGION = 2,
+            COMPLEXREGION = 3,
+        }
+        [DllImport("gdi32.dll")]
+        internal static extern bool DeleteObject(nint hObject);
+
+        [DllImport("gdi32.dll")]
+        private static extern nint CreateRectRgn(int x1, int y1, int x2, int y2);
+    }
+}