| DirectX SDK | 
The RGB_GETRED macro retrieves the red component of a D3DCOLOR value.
RGB_GETRED(rgb) (((rgb) >> 16) & 0xff)
Returns the red component.
  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Windows CE: Unsupported.
  Version: Requires DirectX 2.0 or later.
  Header: Declared in d3dtypes.h.