windows - GetSystemMetrics(SM_CXSIZE) returns incorrect value in Win 2012

Question

I am trying to get the size of the button in Windows in my project using windows API GetSystemMetrics(SM_CXSIZE).

Whereas GetSystemMetrics(SM_CXSIZE) returns '36' in Windows 8 and I am able to adjust the tool bar window correctly. But it returns '22' in Windows Server 2012 and I am not able to adjust my tool bar properly.

A sample code snippet is:

#include <windows.h>
#include <stdio.h>
#pragma comment(lib, "user32.lib")

int main()
{    
   printf("Value SM_CXSIZE: %d", GetSystemMetrics(SM_CXSIZE));   
   return 0;
}

Can you please suggest a way to accomplish this.