// 设置线样式 CMapXStyle style; style.CreateDispatch(style.GetClsid()); style.SetLineColor(miColorBlue); style.SetLineStyle(2); style.SetLineWidthUnit(miStyleUnitPixel); style.SetLineInterleaved(FALSE); VARIANT varpnts; varpnts.vt = VT_DISPATCH; varpnts.pdispVal = trackpoints.m_lpDispat