PALETTERGB - 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

PALETTERGB

The PALETTERGB macro accepts three values that represent the relative intensities of red, green, and blue and returns a palette-relative red, green, blue (RGB) specifier consisting of 2 in the high-order byte and an RGB value in the three low-order bytes. An application using a color palette can pass this specifier, instead of an explicit RGB value, to functions that expect a color.

COLORREF PALETTERGB(

BYTE bRed,	// red component of palette-relative RGB
BYTE bGreen,	// green component of palette-relative RGB
BYTE bBlue	// blue component of palette-relative RGB
);

Parameters
bRed

Specifies the intensity of the red color field.

bGreen

Specifies the intensity of the green color field.

bBlue

Specifies the intensity of the blue color field.

Return Values
The return value is a palette-relative RGB specifier. For output devices that support logical palettes, Windows matches a palette-relative RGB value to the nearest color in the logical palette of the device context as though the application had specified an index to that palette entry. If an output device does not support a system palette, Windows uses the palette-relative RGB as though it were a conventional RGB doubleword returned by the RGB macro.

Remarks
The PALETTERGB macro is defined as follows:

#define PALETTERGB(r, g, b) (0x02000000 | RGB(r, g, b))

See Also
PALETTEINDEX, RGB

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