Subject Re: prevent program opening twice From Bernard Mouille <bernardmouille16@gmail.com> Date Sat, 21 Sep 2024 11:30:02 -0400 Newsgroups dbase.getting-started Hello Charlie, Look some code. // Returns true if the window is running ( _Lib1 ). function bd_IsWindowRun( cWindow, lMsgbox )    if argcount() < 2       lMsgbox = true    endif    if bd_FindWindow( null, cWindow ) <> 0       if lMsgbox // Message if this function is used for not run 2 times the form.          msgbox( "Window [ " + cWindow + " ] is running, Abort", "Find window", 48 )       endif       return true    endif    return false // Find the handle of a window( _lib1.cc ). function bd_FindWindow( cClass, cWindow )    local hHandle    if type( "FindWindowA" ) <> "FP"       extern CHANDLE FindWindowA( CSTRING, CSTRING ) user32.dll    endif    hHandle = FindWindowA( cClass, cWindow )    return hHandle Regards, Bernard. Charlie Wrote: > There was a post here a couple of years with instructions of preventing a form (i think) from opening twice.  I can't seem to find it when searching.  Can anyone point me to it?  Thanks much.