The RGB_GETRED macro retrieves the red component of a D3DCOLOR value.
RGB_GETRED(rgb) (((rgb) >> 16) & 0xff)
The macros returns the red component.
Windows NT: Use version 4.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in d3dtypes.h.