internal override void RemoveReflectChild()
{
if (--_childCount < 0)
{
Debug.Fail("How did parkingwindow childcount go negative???");
_childCount = 0;
}
if (_childCount != 0 || !IsHandleCreated)
{
return;
}
// Check to see if we are running on the thread that owns the parkingwindow.
// If so, we can destroy immediately.
//
// This is important for scenarios where apps leak controls until after the
// messagepump is gone and then decide to clean them up. We should clean
// up the parkingwindow in this case and a postmessage won't do it.
uint id = User32.GetWindowThreadProcessId(HandleInternal, out _);
ThreadContext context = ThreadContext.FromId(id);
// We only do this if the ThreadContext tells us that we are currently
// handling a window message.
if (context is null || !ReferenceEquals(context, ThreadContext.FromCurrent()))
{
User32.PostMessageW(HandleInternal, (User32.WM)WM_CHECKDESTROY);
}