UG二次开发建空草图代码运行问题

yueminlee*

建空草图的代码如下：为什么运行后没反应呢？

1. void sanxiao:: CreatIPsketch()
   
2. {
   
3.     Sketch *nullSketch(NULL);
   
4.     SketchInPlaceBuilder *sketchInPlaceBuilder1;
   
5.     sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
   
6.         sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);
   
7.         sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);
   
8. 
   
9.     NXObject *nXObject1;
   
10.     nXObject1 = sketchInPlaceBuilder1->Commit();
    
11. 
    
12.         Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
    
13.     Features::Feature *feature1;
    
14.     feature1 = sketch1->Feature();
    
15. 
    
16.         sketchInPlaceBuilder1->Destroy();
    
17. 
    
18. }

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