You may find the following thread on Tek-Tips particular useful and informative. It contains most of the ways to do this.

http://www.tek-tips.com/viewthread.cfm?qid=672388

>Hi,
>
>Is thre a way to determine if an application is running, by "part" of its caption?
>
>I'm using Declare Long FindWindowA In Win32API String Class, String Title to get that information when I know the entire app caption, but there is a means to get it like that:
>
>_Screen.Caption = "SystemName - ModuleName - Title of App Running"
>
>that is, just by the left part (in bold) of _Screen.Caption?
>
>Regards,
>
>Fernando