Set OpenRA.Game.exe icon to match the mod.

packaging/windows/WindowsLauncher.cs.in

@@ -23,6 +23,34 @@ namespace OpenRA
 {
 	class WindowsLauncher
 	{
+		[DllImport("user32.dll")]
+		static extern int SendMessage(IntPtr hwnd, uint message, uint wParam, IntPtr lParam);
+
+		[DllImport("shell32.dll")]
+		static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags);
+
+		[DllImport("user32.dll")]
+		public extern static bool DestroyIcon(IntPtr handle);
+
+		struct SHFILEINFO
+		{
+			// Native type: HICON
+			public IntPtr hIcon;
+
+			public int iIcon;
+			public uint dwAttributes;
+
+			// Native type: TCHAR[MAX_PATH]
+			[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
+
+			public string szDisplayName;
+
+			// Native type: TCHAR[80]
+			[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
+
+			public string szTypeName;
+		}
+
 		static Process gameProcess;
 
 		// Constants to be replaced by the wrapper / compilation script
@@ -30,6 +58,9 @@ namespace OpenRA
 		const string DisplayName = "DISPLAY_NAME";
 		const string FaqUrl = "FAQ_URL";
 
+		// References to the OpenRA.Game.exe icons for later cleanup
+		static IntPtr[] iconHandle = { IntPtr.Zero, IntPtr.Zero };
+
 		[STAThread]
 		static void Main(string[] args)
 		{
@@ -60,6 +91,21 @@ namespace OpenRA
 			if (gameProcess == null)
 				return;
 
+			if (Platform.CurrentPlatform == PlatformType.Windows)
+			{
+				// Set the OpenRA.Game.exe icon to match the mod
+				// Icon.ExtractAssociatedIcon sets only the 32px icon,
+				// so we use native functions to set both 16 and 32px versions.
+				gameProcess.WaitForInputIdle();
+				SHFILEINFO sfi = new SHFILEINFO();
+				for (var i = 0; i < 2; i++)
+				{
+					SHGetFileInfo(Assembly.GetExecutingAssembly().Location, 0, ref sfi, (uint)Marshal.SizeOf(sfi), (uint)(0x100 + i));
+					iconHandle[i] = sfi.hIcon;
+					SendMessage(gameProcess.MainWindowHandle, 0x80, (uint)(1 - i), sfi.hIcon);
+				}
+			}
+
 			gameProcess.EnableRaisingEvents = true;
 			gameProcess.Exited += GameProcessExited;
 
@@ -147,6 +193,11 @@ namespace OpenRA
 			if (gameProcess.ExitCode != (int)RunStatus.Success)
 				ShowErrorDialog();
 
+			if (Platform.CurrentPlatform == PlatformType.Windows)
+				foreach (var handle in iconHandle)
+					if (handle != IntPtr.Zero)
+						DestroyIcon(handle);
+
 			Exit();
 		}