Hi George,

I finnaly got a chance to try out the code from the article. I have a question. In the INIT procedure of the MUTEX the line:
.nmutexerror = getlasterror() always gives me 0.

Since I had no idea what a MUTEX was and didn't have Win32.hlp, I created a .prg called MUTEX.prg. In it I put:

DEFINE CLASS mutex AS CUSTOM

cformcaption = ""
hmutex = 1
nmutexerror = 0

Then I put the 3 procedures.

Since I never created a class other than an object class I could use on a form I assumed this was the correct way to get this going.

Any insights you have would be much apreciated

TIA
Mike