The HorizontalResolution property indicates the current number of pixels in the horizontal direction (X axis) of the display. ...

The HorizontalResolution property indicates the current number of pixels in the horizontal direction (X axis) of the display.
Example: 1024  
This property has been deprecated in favor of a corresponding property(s) contained in the Win32_VideoController, Win32_DesktopMonitor and//or CIM_VideoControllerResolution