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GetPixel info  Overview  Group

The GetPixel function retrieves the red, green, blue (RGB) color value of the pixel at the specified coordinates.

COLORREF GetPixel(

    HDC hdc,

// handle of device context

    int XPos,

// x-coordinate of pixel

    int nYPos 

// y-coordinate of pixel

   );

Parameters

hdc
Identifies the device context.
nXPos
Specifies the logical x-coordinate of the pixel to be examined.
nYPos
Specifies the logical y-coordinate of the pixel to be examined.

Return Values

The return value is the RGB value of the pixel. If the pixel is outside of the current clipping region, the return value is CLR_INVALID.

Remarks

The pixel must be within the boundaries of the current clipping region.

Not all devices support GetPixel. An application should call GetDeviceCaps to determine whether a specified device supports this function.

See Also

GetDeviceCaps, SetPixel

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