public static bool IsOwned(
IntPtr owner, IntPtr hwnd,
ref int level)
{
while (true)
{
var ownerWindow = WindowNative
.GetWindow(hwnd, ModalWindow.GwOwner);
if (ownerWindow == IntPtr.Zero)
{
return(false);
}
if (ownerWindow == owner)
{
return(true);
}
++level;
hwnd = ownerWindow;
}
}