In a commandbutton click method I start a Word session (or get a reference to an existing Word session if available), make it open a document, activate the Word session and start a timer. When the timer event fires it sets Interval = 0 and checks if the VFP app is the topmost Window, as suggested by Sergey.

If the app is the topmost Window it then checks if the document is in use, assuming that only Word uses it, which is a safe enough assumption. So far so good. If the document is in use it shows messagebox with instruction to first close editing session via a message box. At this point it activates the Word session with loWord.Activate() and restarts timer. Here is where a problem occurs: the first couple of times if succeeds at making Word the topmost Window, but if user continues to choose the VFP app via the Windows Taskbar, focus will remain in my app while the Word session simply flashes in Windows Taskbar. This is a problem because timer will then keep firing and messaging.

Any ideas?

Thank you very much.

Alex