BYTE GetRValue(rgbColor)
This macro extracts the red value from an RGB color value.
| Parameter | Type/Description |
| rgbColor | DWORD Specifies a red, a green, and a blue color field, each specifying the intensity of the given color. |
The return value specifies a byte that contains the red value of the rgbColor parameter.
The value 0FFH corresponds to the maximum intensity value for a single byte; 000H corresponds to the minimum intensity value for a single byte.