[farshizzo]

You can use the win32gui.GetForegroundWindow function to get a handle to the active window. You can check this handle against the Vizard window handle to determine whether Vizard has focus:

import win32gui

def VizardHasFocus():
	return win32gui.GetForegroundWindow() == viz.window.getHandle()

if VizardHasFocus():
	print 'Vizard has focus'
else:
	print 'Vizard does not have focus'