public static void RemoveMenu(IntPtr hWnd)
{
IntPtr menu = WinAPI.GetMenu(hWnd);
int menuItemCount = WinAPI.GetMenuItemCount(menu);
for (int i = 0; i < menuItemCount; i++)
{
WinAPI.RemoveMenu(menu, 0u, 5120u);
}
WinAPI.DrawMenuBar(hWnd);
}