提示用户输入一个点坐标.

• 回答：

          void CTestVc2005Dlg::DoDynDrag()
          {            long lBak = 0;
              m_ocx.GetSysVarLong(_T("DYNINPUT"),&lBak);
              m_ocx.SetSysVarLong(_T("DYNINPUT"),0);
  
              MxDrawXLib::IMxDrawUiPrPointPtr getPt;
              getPt.CreateInstance(__uuidof( MxDrawXLib::MxDrawUiPrPoint ));
  
              IMxDrawUiPrPoint* pGetPt = getPt;
              pGetPt->put_message(_T("点取插入点"));
              if(pGetPt->go() != mcOk)
              {
                  m_ocx.SetSysVarLong(_T("DYNINPUT"),lBak);
                  return;
              }
  
              IMxDrawPointPtr frstPt = pGetPt->value();
              if(frstPt == NULL)
              {
                  m_ocx.SetSysVarLong(_T("DYNINPUT"),lBak);
                  return;
              }
  
  
  
              MxDrawXLib::IMxDrawUiPrPointPtr getSecondPt;
              getSecondPt.CreateInstance(__uuidof( MxDrawXLib::MxDrawUiPrPoint ));
  
              pGetPt = getSecondPt;
  
              IMxDrawCustomEntityPtr spDrawData =pGetPt->InitUserDraw(DYNDRAG_DRAW_ID);
  
  
              pGetPt->put_message(_T("点取旋转角度"));
              pGetPt->put_basePoint(frstPt);
              pGetPt->setUseBasePt(VARIANT_TRUE);
  
              spDrawData->SetPoint(_T("pt1"),frstPt);
  
              CString sBlkFile;
              CString sBlkName(_T("Tree"));
              sBlkFile.Format(_T("%s\Blk\树.dwg"),m_ocx.GetOcxAppPath() );
              short iret = m_ocx.InsertBlock(sBlkFile,_T("Tree"));
  
              spDrawData->SetString(_T("BlkName"),_T("Tree"));
  
              if(pGetPt->go() != mcOk)
              {
                  m_ocx.SetSysVarLong(_T("DYNINPUT"),lBak);
                  return;
              }
  
              spDrawData->Draw();
  
              m_ocx.SetSysVarLong(_T("DYNINPUT"),lBak);
          }
  
  
          void CTestVc2005Dlg::DynWorldDrawMxdrawxctrl1(double dX, double dY, LPDISPATCH pWorldDraw, LPDISPATCH pData, long* pRet)
          {
              // TODO: 在此处添加消息处理程序代码
              IMxDrawCustomEntityPtr spDrawData;
              pData->QueryInterface(&spDrawData);
  
              IMxDrawWorldDrawPtr spWordDraw;
              pWorldDraw->QueryInterface(&spWordDraw);
  
              CString sGuid = spDrawData->Guid;
  
              *pRet = 0;
              if(sGuid == DYNDRAG_DRAW_ID)
              {
                  // 动态插入图块。
                  IMxDrawPointPtr firstPt =  spDrawData->GetPoint(_T("pt1"));
                  if(firstPt == NULL)
                      return;
  
                  CString sBlkName = spDrawData->GetString(_T("BlkName"));
  
                  MxDrawXLib::IMxDrawPointPtr secondPt;
                  secondPt.CreateInstance(__uuidof( MxDrawXLib::MxDrawPoint ));
  
                  secondPt->put_x(dX);
                  secondPt->put_y(dY);
  
                  IMxDrawVector3dPtr vec = firstPt->SumVector(secondPt);
                  double dAng = vec->Angle();
  
                  _bstr_t psxBlkName = sBlkName.AllocSysString();
                  spWordDraw->DrawBlockReference(firstPt->x,firstPt->y,psxBlkName,1.0,dAng * 180.0 / 3.14159265 + 90.0);
  
                  *pRet = 1;
              }
  
          }