The GetPixel function retrieves the red, green, blue (RGB) color value of the pixel at the specified coordinates.
COLORREF GetPixel(
HDC hdc, // handle to device context
int XPos, // x-coordinate of pixel
int nYPos // y-coordinate of pixel
);
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.
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.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in wingdi.h.
Import Library: Use gdi32.lib.
Bitmaps Overview, Bitmap Functions, GetDeviceCaps, SetPixel