创建块，CreateAnonymousBlock 的用法

AcDbObjectPointer <CCivilDbPipeNode > pPipeNode( aryRes[i] , AcDb :: kForRead);
if ( pPipeNode.openStatus() != Acad ::eOk )
{
    continue;
}

AcGePoint3d ptCenter = pPipeNode->Position();
AcDbBlockTableRecord* pBlockTableRecord = new AcDbBlockTableRecord;
AcDbObjectId blockId;
Acad::ErrorStatus ret = AcDbUtils::CreateAnonymousBlock(pBlockTableRecord, blockId, acdbCurDwg());
if (ret == Acad::eOk)
{
　　AcDbLine* lineX = new AcDbLine;
　　lineX->setStartPoint(ptCenter);
　　AcGeVector3d vec = AcGeVector3d::kXAxis;
　　vec.rotateBy(MathUtils::kRad45, AcGeVector3d::kZAxis);
　　AcGePoint3d ptEnd = ptCenter + vec* dRadius*1.5;
　　lineX->setEndPoint(ptEnd);
　　pBlockTableRecord->appendAcDbEntity(lineX);
　　lineX->close();

　　CString strText;
　　strText.Format(_T("最大洪流量%.2f立方米"), aryValueMax[i]);
　　AcDbText* textVol = new AcDbText;
　　textVol->setTextString(strText);
　　textVol->setPosition(AcGePoint3d(ptEnd.x, ptEnd.y+0.5, ptEnd.z));
　　pBlockTableRecord->appendAcDbEntity(textVol);
　　textVol->close();

　　AcDbExtents extentText;
　　textVol->getGeomExtents(extentText);

　　AcDbLine* lineY = new AcDbLine;
　　lineY->setStartPoint(ptEnd);
　　lineY->setEndPoint( AcGePoint3d( extentText.maxPoint().x, ptEnd.y, ptEnd.z) );
　　pBlockTableRecord->appendAcDbEntity(lineY);
　　lineY->close();

　　AcDbCircle* circle = new AcDbCircle(ptCenter, AcGeVector3d::kZAxis, dRadius);
　　circle->setColorIndex(nColorIndex);
　　circle->setLineWeight(nLineWeight);
　　pBlockTableRecord->appendAcDbEntity(circle);
　　circle->close();

　　pBlockTableRecord->setOrigin(ptCenter);
　　pBlockTableRecord->close();
}

if (blockId.isValid())
{
　　AcDbBlockReference *pBlkRef = new AcDbBlockReference;
　　if( pBlkRef )
　　{
　　　　CAppXdata xData2(_T("HYSWMMTAG"), pBlkRef->database());
　　　　xData2.SetValue(1070, 0, 0);
　　　　xData2.SetXdata(pBlkRef);
　　}

　　pBlkRef->setBlockTableRecord(blockId);
　　pBlkRef->setPosition(ptCenter);
　　AcDbUtils::AddToCurrentSpaceAndClose(pBlkRef);
}


// 从图面查找，并删除
filter = acutBuildList(RTDXF0,_T(""INSERT"") , -3, 1001, _T("HYSWMMTAG"), 0);

CAcadSelSet selEnt;
if (selEnt.AllSelect(filter) != CAcad

SelSet::kSelected)
return;

AcDbObjectIdArray idsBlkEnt;
selEnt.AsArray(idsBlkEnt);

AcDbUtils::EraseEntitys(idsBlkEnt);