public static void ShowWaitForm(this UserControl owner)
{
if (Managers.ContainsKey(owner))
{
return;
}
SplashScreenManager manager = new SplashScreenManager(typeof(UserControlWaitForm),
SplashFormStartPosition.Manual, owner.Parent.PointToScreen(owner.Location),
new SplashFormProperties());
Managers.Add(owner, manager);
manager.ShowWaitForm();
manager.SendCommand(UserControlWaitFormCommand.SetSize, owner.Size);
}