NOTSRCERASE Combines the colors of the source and destination rectangles by using the Boolean OR operator and then inver将源矩形与目标矩形的颜色通过逻辑或操作混合后，再反色。
SRCERASE Combines the inverted colors of the destination rectangle with the colors of the source rectangle by using the 将目标矩形的反色与源矩形的颜色进行逻辑与操作。