OLAPEditDimensionRequest
To update the structure of existing OLAP dimensions,
        you can use the data type OLAPEditDimensionRequest:
void EditDimensionRequestDemo()
{
    OLAPEditDimensionRequest request = OLAPCreateEditDimensionRequest("TESTDIM");
    OLAPAddNumericalElement(request, "A");
    OLAPAddNumericalElement(request, "B", "A", 1.0);
    OLAPAddTextualElement(request, "T");
    OLAPConnection c = OLAPCreateNamedConnection("");
    OLAPSendRequest(c, request, false);
    OLAPDisconnect(c);
}
			The process edits a dimension named TESTDIM and adds a new numerical
				dimension element named A. Then it adds another numerical dimension
				element named B and sets its parent to A. Eventually, the process
				adds a new textual element named T.