e gray colors, MM_OR and MM_AND used with the gray colors can be thought of as lightening and darkening operations. For instance, AND-ing C_LIGHT_GRAY together with C_LIGHT_RED color results in the darker C_RED.</P>
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When using drawing modes, it often pays to be aware of where a drawing command is drawing something as blank as opposed to where it isn't drawing at all. Filling a rectangular area of the screen with a black and white checkerboard pattern isn't exactly like drawing only the corresponding bla