>Great, Found the FindWindow API, which dll is it in?

Check this one:

FUNCTION CheckWin
* Routine which sees if an application is active by looking for its
* Window title
* expC1 Window title
PARAMETER tcTitle
returnv=.F.
mGetWinTxt=RegFn("GetWindowText","I@CI","I")
mGetWindow=RegFn("GetWindow","II","I")
mIsWinVis=RegFn("IsWindowVisible","I","I")
foxhwnd=MAINHWND()
hwndNext=CallFn(mGetWindow,foxhwnd,0)
DO WHILE hwndNext<>0
Stuffer=SPACE(64)
x=CallFn(mGetWinTxt,hwndnext,@Stuffer,64)
IF UPPER(tcTitle)$UPPER(stuffer)
returnv=.T.
ENDIF
hwndNext=CallFn(mGetWindow,hwndnext,2)
ENDDO
RETURN returnv