Add a call to Application.DoEvents() before launching the example. This should ensure that the launcher window disappears before the example is launched and should also take care of any keyboard/mouse handling issues.

Source/Examples/ExampleLauncher.cs

@@ -153,6 +153,7 @@ namespace Examples
 
                     Debug.Print("Launching example: {0}", example.ToString());
                     this.Visible = false;
+					Application.DoEvents();
 
                     example.GetMethod("Main").Invoke(null, null);