The drawing mode is called R2_NOTMERGEPEN.Windows performs a bitwise OR operation on the destination pixels and the pen pixels and then inverts the result.

• 有四种使用黑色或白色画笔在黑色或白色目标上绘制的组合：白色画笔在白色目标上，白色画笔在黑色目标上，黑色画笔在白色目标上以及黑色画笔在黑色目标上。