prgbtriple.cpp

#include <windows.h>

int main() {
	HDC desk = GetDC(0); HWND wnd = GetDesktopWindow();
	int sw = GetSystemMetrics(0), sh = GetSystemMetrics(1);
	BITMAPINFO bmi = { 40, sw, sh, 1, 24 };
	PRGBTRIPLE rgbtriple;
	for (;;) {
		desk = GetDC(0);
		HDC deskMem = CreateCompatibleDC(desk);
		HBITMAP scr = CreateDIBSection(desk, &bmi, 0, (void**)&rgbtriple, 0, 0);
		SelectObject(deskMem, scr);
		BitBlt(deskMem, 0, 0, sw, sh, desk, 0, 0, SRCCOPY);
		for (int i = 0; i < sw * sh; i++) {
			int x = i % sw, y = i / sh, t = y ^ y | x;
			rgbtriple[i].rgbtRed += GetRValue(i)&i;
			rgbtriple[i].rgbtGreen += GetGValue(i)&i;
			rgbtriple[i].rgbtBlue += GetBValue(i)&i;
		}
		BitBlt(desk, 0, 0, sw, sh, deskMem, 0, 0, SRCCOPY);
		ReleaseDC(wnd, desk);
		DeleteDC(desk); DeleteDC(deskMem); DeleteObject(scr); DeleteObject(wnd); DeleteObject(rgbtriple); DeleteObject(&sw); DeleteObject(&sh); DeleteObject(&bmi);
	}
}