Hi developers and experts.
I cannot tell you how frustrating this has been and the embarassment it has caused me with my client.
My application runs just fine on my PC - and even other PCs, but one particular client running Windows XP Professional Service Pack 2 find that my application hangs and he has to terminate it - this is because windows get 'stuck' behind other windows. This normally occurs if I show a "modal" window or stay-on-top window - things like popup messages asking you to choose Yes or No before it will let you continue. Well if XP re-arranges the Z-order then the modal windows can get stuck behind other windows in the application and the user cannot see the active window.
Now originally I thought I solved the problem - GHOSTING!.
In my application I disable XP ghosting - but it seems he continues to have a problem.
Sometimes Alt-Tabbing out of the application and back in brings the correct form to the front - but now even that's not doing the trick.
If anybody knows anything that can help me please share!