Suppression and Unsuppression of elements in a pattern

Read about general suppression programatically first, if you have't already.

Within a single RectangularPattern (or any other pattern) you can use this fragment as a starting point for suppressing individual features within a pattern. Note that the first element in a pattern cannot be suppressed.

       CComPtr<Parameter> XCountParam ;

       pRectPatFeat->get_XCount (&XCountParam) ;

       const int ikXCount = XCountParam->GetValue () ;

       TRACE (L"Component %d is called %s, and the x count is %d ",iRect,bstrName,ikXCount) ;

       CComPtr<FeaturePatternElements> pFeaturePatternElements ;

       pRectPatFeat->get_PatternElements (&pFeaturePatternElements) ;

       const int ikNumElements = pFeaturePatternElements->GetCount() ;

       TRACE (L", this has %d FeaturePatternElements\n",ikNumElements) ;

       // Start at 2 because the first element cannot be suppressed

       for (int iElem = 2 ; iElem <= ikNumElements ; iElem++) {

           CComPtr<FeaturePatternElement> pFeaturePatternElement ;

           pFeaturePatternElements->get_Item (iElem,&pFeaturePatternElement) ;

           VARIANT_BOOL bSuppressed ;

           if (((iElem/2)*2) == iElem) {

               bSuppressed = VARIANT_TRUE ;

           } else {

               bSuppressed = VARIANT_FALSE ;

           }

           pFeaturePatternElement->put_Suppressed(bSuppressed) ;

       }

       ::SysFreeString(bstrName);

   }

Note that you'll need to call Update to refresh the display:

   pPartDocument->Update () ; // Like an AutoCAD regen