NX二次开发-NXOPEN工程图导出CAD图纸DxfdwgCreator *dxfdwgCreator1;

没有什么可以看的，NXOPEN直接录制一下导出CAD就可以了。
录制出来自己挑需要的代码拿过来改一下。

 NX9+VS2012

 #include <NXOpen/Part.hxx>
 #include <NXOpen/PartCollection.hxx>
 #include <NXOpen/Session.hxx>
 #include <NXOpen/DxfdwgCreator.hxx>
 #include <NXOpen/DexManager.hxx>

 DxfdwgCreator *dxfdwgCreator1;
 dxfdwgCreator1 = theSession->DexManager()->CreateDxfdwgCreator();

 dxfdwgCreator1->SetExportData(DxfdwgCreator::ExportDataOptionDrawing);

 dxfdwgCreator1->SetAutoCADRevision(DxfdwgCreator::AutoCADRevisionOptionsR2004);

 dxfdwgCreator1->SetViewEditMode(true);

 dxfdwgCreator1->SetFlattenAssembly(true);

 dxfdwgCreator1->SetExportScaleValue("1:1");

 //dxfdwgCreator1->SetOutputFileType(DxfdwgCreator::OutputFileTypeOptionDxf);//导出DXF
 dxfdwgCreator1->SetOutputFileType(DxfdwgCreator::OutputFileTypeOptionDwg);//导出DWG

 dxfdwgCreator1->SetOutputFile("D:\\test5.dwg");

 dxfdwgCreator1->ObjectTypes()->SetCurves(true);

 dxfdwgCreator1->ObjectTypes()->SetAnnotations(true);

 dxfdwgCreator1->ObjectTypes()->SetStructures(true);

 dxfdwgCreator1->SetInputFile("D:\\test5.prt");

 NXObject *nXObject1;
 nXObject1 = dxfdwgCreator1->Commit();

 dxfdwgCreator1->Destroy();