The HFMwCustom2 component contains the dimension property. This component enables you to work with the Custom 2 dimension.
Obtaining an HFMwCustom2 Object Reference
HFMwCustom2 object references are returned by the custom2 property of the HFMwMetadata component. After obtaining an HFMwCustom2 object reference, you can then use the dimension property to initialize the HFMwDimension component to the Custom 2 dimension.