Must I use DrawPoly to draw a non-filled rect?

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ImaginaryHuman
 #1
Just draw 4 lines.

or...In OpenGL ... this might not be entirely accurate...untested

glBegin(GL_LINES)
    glvertex2i(x+1,y)
    glvertex2i(x+width-1,y) 'first line
    glvertex2i(x+width-1,y+1)
    glvertex2i(x+width-1,y+height-2) 'second line
    glvertex2i(x+1,y+height-2)
    glvertex2i(x+width-1,y+height-1) 'third line
    glvertex2i(x,y)
    glvertex2i(x,y+height-1) 'fourth line
glEnd()