[原创]MAPX简单的问题，新手请教

<P><FONT size=2><FONT color=#cc0033>ConvertCoord</FONT> X, Y, X2, Y2, miScreenToMap </FONT></P>
<P><FONT size=2>这个函数怎么使用啊！</FONT></P>
<P>X1 = -111.0542<BR>Y1 = 45.0009<BR>X2 = -104.0528<BR>Y2 = 41.0018<BR>if map1.ClipLine(X1,Y1,X2,Y2) then<BR>mp1.ConvertCoord X, PY, X1,Y1, miMapToScreen<BR>MoveToEx hDC, PX, -PY, pt ' win api call<BR>map1.ConvertCoord PX, PY, X2,Y2, miMapToScreen<BR>LineTo hDC, PX, -PY ' win api call<BR>end if</P>
<P>这段代码是什么意思？新手请教</P>

<P>意思是将两点的经纬度坐标转化为屏幕坐标，在两点间画线。</P>