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However, I need to stop processing in my app until Adobe Acrobat Reader is closed so I can then delete the .pdf and .xfdf files. I cannot use createprocess because createprocess only works with executables. The handle returned by isrunning is never found using waitforsingleobject. Any idea how can I convert the value returned by isrunning() to a value required by waitforsingleobject?
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PMFJI Tracy,
I also had a need to waitfor completion of shellexecuted files. It was not as easy as using WaitForSongleObject. It simply didn't work for my case, I could easily defeat it not waiting anymore though it should. The result I sorted was more a cheat checking windows existing before and after the call to shellexecute was made (and honestly even it was not an easy one as some applications first spawn a window and that window spawns another passing the control and kills first window). Then I simply checked 'captured' window's being a valid window or not (IsWindow). It worked, but rather complex as I needed to create an FLL for it (VFP didn't support callback functions I used).
Now back to your problem :) I don't think you ever need complex API to wait app to finish. Since all you want to be able to delete it you might instead check if you can.

Spawn a timer
Timer checks if it could open the files ReadWrite
If it can, closes the file and deletes, disables itself

With timer approach you don't even need to wait for it, continue your work on something else. Or if you absolutely want to wait you might create a do while loop with Sleep() in it.

Cetin