MFC实现橡皮筋画线

用MFC实现画线 infile.open(OpenDialog.GetPathName(),ios_base::binary); // if(!infile.is_open()) { return; } //读入个数 int nLine = 0; infile.read((char*)&nLine,sizeof(int)); //读入线 for(int i = 0; i < nLine; i ++) { CLine line; infile.read((char*)&line,sizeof(CLine)); m_vLines.push_back(line); } infile.close(); Invalidate(TRUE); }