Edgar,
I don't think a hung VFP app is going to respond to the message you are sending it.
Check to see if you have tskill.exe on your machine in the \windows\system32 folder. If so you can use the article
http://msdn.microsoft.com/msdnmag/issues/02/08/CQA/default.aspx do help you work out the details of running it.
>The code runs but the application-to-terminate remains suspended - does not go away
>Is SendMessage need to be changed for Win2000 or WinNT?