-</PRE>
-<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- The <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> routines overlay <EM>srcwin</EM> on top
- of <EM>dstwin</EM>. <EM>scrwin</EM> and <EM>dstwin</EM> are not required to be the
- same size; only text where the two windows overlap is
- copied. The difference is that <STRONG>overlay</STRONG> is non-destructive
- (blanks are not copied) whereas <STRONG>overwrite</STRONG> is destructive.
-
- The <STRONG>copywin</STRONG> routine provides a finer granularity of con-
- trol over the <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> routines. As in the
- <STRONG>prefresh</STRONG> routine, a rectangle is specified in the destina-
- tion window, (<EM>dminrow</EM>, <EM>dmincol</EM>) and (<EM>dmaxrow</EM>, <EM>dmaxcol</EM>),
- and the upper-left-corner coordinates of the source win-
- dow, (<EM>sminrow</EM>, <EM>smincol</EM>). If the argument <EM>overlay</EM> is <STRONG>true</STRONG>,
- then copying is non-destructive, as in <STRONG>overlay</STRONG>.