FT_SHADOW()
 Draw a non-destructive shadow on the screen
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 Syntax

     FT_SHADOW( <nTop>, <nLeft>, <nBottom>, <nRight> [ ,<nAttr>] ) -> NIL

 Arguments

    <nTop>    is the top row of the shadow area.
    <nLeft>   is the upper left column of the shadow area.
    <nBottom> is the bottom row of the shadow area.
    <nRight>  is the lower right column of the shadow area.
    <nAttr>   is optional and is the screen attribute to use for drawing
              the shadow.  If not specified, the default is 8.

 Returns

    NIL

 Description

    This function allows you to implement the popular "shadow effect."  It
    draws a shadow using the specified screen coordinates.  The shadow
    is drawn along the bottom and right side of the specified region.

    The source code is written to TASM IDEAL mode.

 Examples

    FT_Shadow(10,10,15,50, 8)  // draw a dim shadow

    FT_Shadow(10,10,15,40,47)  // draw a green shadow

 Source: SHADOW.ASM

 Author: Ted Means