ikohl wrote:
...how can i let a windows gui program run in background...
What exactly do you mean by this? Unlike Unix, Windows does not have the capability to run processes in the background. They are either running or they are not. A window's Z-order has no bearing on whether its process is running or not.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb