If you restrict the graphics to opengl, you can simply set the drawmode to line before drawing and set it back to filled after drawing.
But that would perhaps be an idea: SetDrawMode <Mode>
<Mode>: DRAW_POINT, DRAW_LINE, DRAW_FILLED
If someone implements it they are most likely going to include it. My prob is mainly that I do not understand enough of DX7 to do it on that side. (and on the OGL side it isn't hard to do)
But that would perhaps be an idea: SetDrawMode <Mode>
<Mode>: DRAW_POINT, DRAW_LINE, DRAW_FILLED
If someone implements it they are most likely going to include it. My prob is mainly that I do not understand enough of DX7 to do it on that side. (and on the OGL side it isn't hard to do)