mmhhh... right, i forgot OpenMutex use the name and not the Handle. I wait to open that web page.
Thanks. ----- Original Message ----- From: "Rob Kennedy" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, April 09, 2005 8:37 PM Subject: Re: [delphi-en] Microsoft SDK > > Mauro Russo wrote: > > Well, Mutexes is important too and i use it, > > but i explained just the proble. > > Not really. You explained your idea for solving a problem. You still > haven't really described what the problem is. > > > Really, the situation is little bit more complicated and i use > > already mutex to jump other problems. > > > > Well, i just thought i can use Handle of Mutex to do what i > > excepted to do by Application.Handle... using OpenMutex instead of tha > > funciont i'm looking for. > > Stop worrying about the value of a handle. A mutex is a kernel object, > and handles to kernel objects are completely meaningless outside the > process that created them, so that leaves you in an even worse situation > than when you were thinking about comparing window handles. (Window > handles are valid globally.) > > When you create a mutex, you get to give it a name. When two processes > try to create a mutex with the same name, they wind up with handles to > the same mutex. (The numeric values of the THandle variables will be > different, but they still refer to the same mutex object in the OS.) > > The OpenMutex function isn't usually of much use. Use CreateMutex > instead. You can call GetLastError to see whether your call to > CreateMutex was the first for the given mutex name or whether the mutex > already existed. From that, you can conclude whether your instance of a > program was the first or whether there was already another instance running. > > -- > Rob > > > ----------------------------------------------------- > Home page: http://groups.yahoo.com/group/delphi-en/ > To unsubscribe: [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > > > ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
