How to obtain the correct physical size of the monitor?

Question

How can I get the size of the display in centimeters or inches?

This code does not always works correctly:

HDC hdc = CreateDC(_T(\"DISPLAY\"),dd.Devi         


        

Answer 1

Windows Vista and upper support new function GetMonitorDisplayAreaSize() http://msdn.microsoft.com/en-us/library/ms775210%28VS.85%29.aspx

Update: It doesn't work properly