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PolyLine()
Draw a series of connected lines
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Syntax
PolyLine( <hDC>, <aPoints> )   -->   lSuccess

Arguments
<hDC> is a handle to the device context on which to draw.

<aPoints> is an array of points.  Each point is itself an
array giving the x- and y- position of the point.

Returns
If successful, logical TRUE (.T.) is returned, otherwise FALSE
(.F.) is returned.

Description
This function draws lines between a series of points, using
the current pen.  The current position (e.g. as set by the
MoveTo() function) is not used or changed.

Example
aPoints = {  { 100, 100 },  { 200, 100 },  { 200, 200 },  {100, 200 }  }
PolyLine( hDC, aPoints )           // 3 sides of a square