In a special case, I am making my main window disabled, minimzed and invisible) and then showing another form which looks like the main form to the user. This is shown in a ShowModal state. Everything works OK on Windows 95. But, on Windows NT, the application hangs at the point where application.processMessages is called. I don't have NT but found this by a debug version of my application which was tested by a user on NT. By a previous version, I know that this problem didn't occur when the main window was only disabled and minimized.
Anyone can confirm or explain this strange behavior on Windows NT 4 sp3? That is, if the main window is made invisible, it can cause processMessages to never return?