what a hack, but the cursors work and the terrain doesnt break anymore

OpenRa.Game/MainWindow.cs

@@ -6,7 +6,8 @@ using OpenRa.TechTree;
 
 namespace OpenRa.Game
 {
-	using GRegion = OpenRa.Game.Graphics.Region;
+	using GRegion = OpenRa.Game.Graphics.Region;
+using System.Runtime.InteropServices;
 
 	class MainWindow : Form
 	{
@@ -21,7 +22,10 @@ namespace OpenRa.Game
 
 			return new Size(settings.GetValue("width", desktopResolution.Width),
 				settings.GetValue("height", desktopResolution.Height));
-		}
+		}
+
+		[DllImport("user32")]
+		static extern int ShowCursor([MarshalAs(UnmanagedType.Bool)] bool visible);
 
 		public MainWindow(Settings settings)
 		{
@@ -58,7 +62,9 @@ namespace OpenRa.Game
 
 			sidebar = new Sidebar(renderer, game);
 
-			renderer.BuildPalette(game.map);
+			renderer.BuildPalette(game.map);
+
+			ShowCursor(false);
 		}
 
 		internal void Run()
@@ -66,6 +72,12 @@ namespace OpenRa.Game
 			while (Created && Visible)
 			{
 				game.Tick();
+
+				// rude hack
+				game.viewport.cursor = (game.controller.orderGenerator is UnitOrderGenerator)
+					&& (game.controller.orderGenerator as UnitOrderGenerator).selection.Count > 0
+					? OpenRa.Game.Cursor.Move : OpenRa.Game.Cursor.Default;
+
 				Application.DoEvents();
 			}
 		}