I'm writing an application with VC++ 1.52.

In some cases, when I call CWnd::Invalidate() from one of my own
message-handlers:

CMyWnd::OnMouseActivate()
{
  m_pOtherWnd->Invalidate();

And when I call CWnd::SetFocus() from a message-handler, OnSetFocus() for this
window will never be called...

Funny: The problem occurs only when the application runs under Win3.11, with
Win95 everthing will be Ok!

Any ideas?

Oliver ;->