c# - Licensing information GetPropertyValue in advance installer? -

i error "error creating window handle" when getting licensing information advance installer http://www.advancedinstaller.com/user-guide/qa-get-licenensing-property.html when c# application running in trial mode.

however when register c# application , run same code mentioned in above link don't error don't value properties mentioned in link.

i thankful kind help.