🚀 go-pugleaf

"Jarkko Halme" <jjhalme@kotiposti.net> wrote in message
news:41cb32b8$1@newsgroups.borland.com...

> I am trying to prevent several instances of my program running.
> I am using C++ Builder v5 and OS is XP. My main looks like below:

Try this code instead:

    WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
    {
        const char mutexname[]="program";
        HANDLE mutex = CreateMutex(NULL, TRUE, mutexname);
        if( mutex )
        {
            if( GetLastError() != ERROR_ALREADY_EXISTS )
            {
                try
                {
                    Application->Initialize();
                    Application->Title = "program";
                    Application->CreateForm(__classid(TForm1), &Form1);
                    Application->Run();
                }
                catch (Exception &exception)
                {
                    Application->ShowException(&exception);
                }
            }
            else
                ShowMessage("Program is already running");

            CloseHandle(mutex);
        }
        return 0;
    }


Gambit