Changes for display in Windows (f.e. Scaling level 150%) - -wt and -wh options result in incorrect screenshots

[Google Code Exporter]

What steps will reproduce the problem?
1. MS Windows 8.1 Display Scaling level 150% (Full HD display)
2. screenshot-cmd.exe -wt "Untitled - Notepad"
3. Open screenshot.png

Expected (but not obtained) output: Notepad's window screenshot

Last version of screenshot-cmd On Windows 8.1 64 bit

WITH WINDOWS DISPLAY SCALING LEVEL = 100% screenshot-cmd DELIVERS THE CORRECT 
OUTPUT ON THE SAME MACHINE!

Original issue reported on code.google.com by [e-mail] on 4 Sep 2014 at 12:45