>I have a button in FoxPro Task1 that launches FoxPro Task2 (separate executables). If the user returns to FoxPro Task1 while Task2 is waiting for events, and presses the button again, I want to "activate" Task2: that is, I want to bring Task2 to the top of the ZOrder and fire some event in Task2 (preferably the form's Activate event).
>
>I can use SetForegroundWindow() to bring the window to the top of the ZOrder, but no event is fired. Notably, if I use Alt-Tab to switch context between Task1 and Task2, no event fires in Task2. I suspect that if I solve the problem for Alt-Tab I will also have solved it for SetForegroundWindow().
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>Is there a FoxPro event in the target window that fires when SetForegroundWindow() is executed? Alternatively, is there a way with VFP 7 that I can capture the apropriate Windows event?

Jack,

You can use Task2's MAIN window title to determine if it is still running.
Check FAQ #7957 to get a feel for identifying windows tasks (processes). There is a API function similar to GetWindowThreadProcessId that will give you the title of the window. You'll have to poke around in the MSDN Knowledgebase (http://msdn.microsoft.com) to find the exact function name.

In any case, you will not be able to intercept Alt-tab task switching inside your VFP application.

To answer the second part of your question, you could write a wrapper function for SetForegroundWindow() that fires a the Activate() event in the target form.

function MySetForegroundWindow(cFormName as String)

     local cCommand

     cCommand = cFormName+".Activate()"
     &cCommand

end function

A final note: Getting VFP to behave like a multi-threaded application is nearly an impossible task. I suggest re-analyzing your project to see if there is another way of accomplishing your goals without two separate tasks.