Here's what I found: [C:\Program Files\JPSoft\TCMD10]echo %@winpid[Process Explorer*] 2244 That happens to be right. (It would be nice if the help file said that wild cards were allowed. ) [C:\Program Files\JPSoft\TCMD10]echo %@winpid[Process Explorer] TCC: (Sys) The parameter is incorrect. "%@winpid[Process Explorer]" It would be better if @WINPID returned -1 if a window with a matching name is not found. Then it could be tested fairly easily as SET MYWINPID=%@WINPID[My application title] IF %MYWINPID LT 0 QUIT 3 or something like that. I like most of the new features. (I don't dislike any of them.) I look forward to a stable version -- I'll be able to remove a bunch of kludges I have in my batch files, mostly related to PIDs of other processes, testing if particular things are running, etc.