The solution was to
declare the applications window handle as a global variable
when I active the application.

With

PUBLIC gnwnd
DECLARE INTEGER GetActiveWindow IN Win32API
gnwnd = GetActiveWindow()

Then I just changed the line in is_run32 to:
from:

lnhwnd = GetActiveWindow()

to:
lnhwnd = gnwnd

Thanks would have never gotten anywhere without the function!!