Draws a filled rectangle in the
currently active image, using the provided x, y, width and height
arguments to set the size of the rectangle. The relevant dimensions
of the image can be fetched with dimx_tile and dimy_tile. Those
dimensions can be used to calculate the desired dimensions of the
slide. The colorcode is either a dwg color index as it is commonly
used in CAD applications or it is one of the special purpose DCL
color codes. Examples of dwg color indices are 1 for red, 2 for
yellow, 5 for blue. The special purpose DCL color codes are
negative integers. These are the special purpose DCL color codes:
-2 background color of the CAD graphics screen -15 background color
of the DCL dialog -16 foreground color of the DCL dialog -18 line
color of the DCL dialog