tter.</DD>
<DT>
MM_NOP</DT><DD>The old drawing remains; nothing is drawn of the new drawing. Just about the only thing likely to change is that the pen position will be updated.</DD>
<DT>
MM_XOR</DT><DD>The color value to display is calculated by taking the bitwise XOR of the new and old colors. If painting in white, this acts as a sort of reverse paint. Note that this bitwise XOR<EM>
 </EM>
is applied to the index numbers of the colors, not to their RGB values.</DD>
<DT>
MM_OR</DT><DD>The color value to di