Web API Reference MapGuide Open Source
#define MG_CHECK_FEATURE_SET_COUNT ( pointer,
methodname   ) 

Value:

if (0 == pointer->GetCount())                                                 \
{                                                                             \
    throw new MgEmptyFeatureSetException(methodname,                          \
        __LINE__, __WFILE__, NULL, L"", NULL);                                \
}


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