fgl_drawbox()
Draws a rectangle in the current window.
Syntax
fgl_drawbox(
   height INTEGER,
   width INTEGER,
   posY INTEGER,
   posX INTEGER,
   color INTEGER )
- height is the height of the rectangle.
 - width is the width of the rectangle.
 - posY is the vertical coordinate (line) of the upper side of the rectangle.
 - posX is the horizontal coordinate (column) of the left side of the rectangle.
 - color is the color number (ignored).
 
Usage
The fgl_drawbox() function draws a rectangle based on the character
 terminal coordinates in the current open window.
Dimensions and coordinates are specified in grid cell units (characters).
This function is provided for backward compatibility. A call to this function will be ignored if the current window is not SCREEN based. The function is supported to draw rectangles in text mode applications.