GetRValue - Win32 Programmer's Reference

Win32 Programmer's Reference

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Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library

Header File
wingdi.h
Unicode
No
Platform Notes
None

GetRValue

The GetRValue macro retrieves an intensity value for the red component of a 32-bit red, green, blue (RGB) value.

BYTE GetRValue(

DWORD rgb	// 32-bit RGB value
);

Parameters
rgb

Specifies an RGB color value.

Return Values
The return value is the intensity of the red component of the specified RGB color.

Remarks
The intensity value is in the range 0 through 255.

The GetRValue macro is defined as follows:

#define GetRValue(rgb) ((BYTE) (rgb))

See Also
GetBValue, GetGValue, PALETTEINDEX, PALETTERGB, RGB

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