method MapCount.
ERROR: Syntax information about IDocumentHelper.MapCount may not be in D:\ArcGIS\DotNet\ESRI.ArcGIS.SystemUtility.dll
[C++]
HRESULT get_MapCount(
BSTR sourceDoc,
long* count
);
[C++]Parameters
sourceDoc [in] sourceDoc is a parameter of type BSTR count [out, retval] count is a parameter of type long