Thank you,Shameel. this answer is what i need.

the batch file finished but cmd.exe is still running - that's what m_BasicDataProc.WaitForExit() is waiting for. Try executing the batch file directly instead of passing it as an argument to cmd.exe. :Badger:

You're welcome. :) Luc Pattyn [Forum Guidelines] [My Articles] Avoiding unwanted divs (as in "articles needing approval") with the help of this FireFox add-in

Thanks everybody.

Thanks. I can read english well,but seems it is much more difficult to write in english,so i think maybe i need someone to talk to in english,and he/she can check if there is a mistake in what i said.

Are you using a download manager? cheers, Chris Maunder CodeProject.com : C++ MVP