For the moment my batch file look like this:
myprogram.exe param1
The program starts but the DOS Window remains open. How can I close it?
Use the start command to prevent the batch file from waiting for the program. Just remember to put a empty double quote in front of the program you want to run after "Start". For example, if you want to run Visual Studio 2012 from a batch command:
Start "" "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\devenv.exe"
notice the double quote after start.