small experiment for virtualpad: clicking buttons returns control to main window. super hacky, but might work for now. analog circle control will still need help. numberupdown for analog control is probably hopeless.

BizHawk.Client.EmuHawk/tools/VirtualPads/controls/VirtualPadButton.cs

@@ -172,6 +172,7 @@ namespace BizHawk.Client.EmuHawk
 
 				base.OnMouseClick(e);
 			}
+			GlobalWin.MainForm.Activate();
 		}
 
 		protected override void OnClick(EventArgs e)
@@ -180,6 +181,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				base.OnClick(e);
 			}
+			GlobalWin.MainForm.Activate();
 		}
 	}
 }