在UG NX编程中，测量距离可以通过以下步骤进行：
获取会话和工作部件
```cpp
NXOpen::Session* theSession = NXOpen::Session::GetSession();
NXOpen::Part* workPart(theSession->Parts()->Work());
```
获取要测量的对象
```cpp
NXOpen::DisplayableObject* object1(dynamic_cast
创建测量距离对象
```cpp
NXOpen::MeasureDistance* measureDistance0;
NXOpen::MeasureDistance* measureDistance1;
```
执行测量
```cpp
measureDistance0 = workPart->MeasureDistance(object1, object2, NXOpen::MeasureDistance::Distance);
measureDistance1 = workPart->MeasureDistance(object2, object1, NXOpen::MeasureDistance::Distance);
```
获取测量结果
```cpp
double distance = measureDistance0->Distance();
```
通过上述步骤，可以在UG NX编程中测量两个对象之间的距离。建议在实际应用中根据具体需求调整代码，并参考最新的UG NX编程文档和教程以确保兼容性和准确性。