Detect if external process is interactive and has any visible UI

Question

I cannot seem to find a way to determine whether a Process has a user interface e.g. a window, which is visible to the user?

• Environment.UserInte

Answer 1

1. Find out the process ID from your Process instance.
2. Enumerate the top-level windows with EnumWindows.
3. Call GetWindowThreadProcessId and see if it matches the target PID.
4. Call IsWindowVisible and/or IsIconic to test if that window is visible to the user.