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本例为圆柱体的特征创建，以及使用Block UI中的点，矢量构造器进行获取用户的输入，通过使用表达式控件获取圆柱体的直径和高度值，从而创建一个圆柱体的过程。

特征的创建方法基本上相同，通常情况下，创建一个空的特征，构建一个feature *** uilder，通过这个featurebuilder进行相关值的指定，最后通过commit进行特征或者对象的创建！

以下位核心部分代码参考：

//get the UI &#118alues;
NXString diameterString,heightString;
std::stringstream ssdia,ssheight;
// get vector
BlockStyler::PropertyList *vectorProperty = vector0->GetProperties();
Vector3d vec = vectorProperty->GetVector("Vector");
delete vectorProperty;
vectorProperty = NULL; // get point
BlockStyler::PropertyList *pointProperty = point0->GetProperties();
Point3d point = pointProperty->GetPoint("Point");
delete pointProperty;
pointProperty = NULL; // get diameter
BlockStyler::PropertyList *diaProperty = expressionDia->GetProperties();
double dia = diaProperty->GetDouble("&#118alue");
delete diaProperty;
diaProperty = NULL;
//get height
BlockStyler::PropertyList *hProperty = expressionH->GetProperties();
double height = hProperty->GetDouble("&#118alue");
delete hProperty;
hProperty = NULL; //convert &#118alues to string
ssdia << dia;
diameterString = ssdia.str(); ssheight << dia;
heightString = ssdia.str(); //create cylinder feature;
Part *workPart(theSession->Parts()->Work());
Part *displayPart(theSession->Parts()->Display());
Features::Feature *nullFeatures_Feature(NULL);

cylinderBuilder1->Height()->SetRightHandSide(heightString);
cylinderBuilder1->SetDirection(vec);
cylinderBuilder1->SetOrigin(point);
cylinderBuilder1->CommitFeature();
cylinderBuilder1->Destroy();