another instance of program is running?

[purusingh1]

How to catch if another instance of the program is running?

[CornedBee]

The usual way in Win32 is to have the program create a named global semaphore/mutex/whatever first thing. They can be queried for. If it already exists, the app is already running.

[Technocrat]

Here is an example:

HANDLE		g_hMutex;
	//Create A Mutex
	g_hMutex = CreateMutex( NULL, TRUE, "Program Name");	//Create A Mutex To Keep The Program From Running More Than Once
	if (g_hMutex && (GetLastError() == ERROR_ALREADY_EXISTS ))
		return 0;

[purusingh1]

Thanks a lot

[NoteMe]

If the problem is that you don't want more then one instance of your app to run. Then you should google on Singelton classes. It's a verey common way to just make one instance of an app run.