Aspose::Words::Markup::CusTomPart::get_IsExternal method. False if this cusTom part is sTored inside the OOXML package. True if this cusTom part is an external target in C++.... auto doc = MakeObject < Document > ( MyDir...parts OOXML package.docx" ); ASSERT_EQ ( 2 , doc -> get_PackageCustomParts...