Icons cleanup

app/UI/IconHelper.cs

@@ -0,0 +1,24 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+namespace GHelper.UI
+{
+    public class IconHelper
+    {
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
+
+        private const uint WM_SETICON = 0x80u;
+        private const int ICON_SMALL = 0;
+        private const int ICON_BIG = 1;
+
+
+        public static void SetIcon(Form form, Bitmap icon)
+        {
+            SendMessage(form.Handle, WM_SETICON, ICON_SMALL, icon.GetHicon());
+            SendMessage(form.Handle, WM_SETICON, ICON_BIG, Icon.ExtractAssociatedIcon(Assembly.GetExecutingAssembly().Location)!.Handle);
+        }
+
+    }
+}