I am utlizando this function so that it returns me I number it of the
PID, but this so this returning one I number negative. What this
making of missed? If they alguem will be able to help, I am thankful
me.

Declare INTEGER GetWindowThreadProcessId IN win32api INTEGER hwnd, INTEGER @lpdwProcessId

test_thread_id = GetWindowThreadProcessId(test_hwnd, @test_pid)
where

since ja I am thankful