I am writing a batch file which is supposed to update the source files from tortoise and - if anything new was gotten - build the solution. Should be a very simple task.

My batchfile looks like this (I've removed the non-essentials)

set updatepath=%1
set solution=%2
set output=%3.txt

call TortoiseProc.exe /command:update /path:%updatepath% /closeonend:2    
call %devenv% %solution% /Build Debug /Out %output%

Now, I'd like to know if tortoise actually got new code for me and the not build if it didn't. How do I do this?

I am running Windows Vista

(The batch script is called from another batch script about 7 times - one for each project I need updated and - perhaps - build).