Use the ICIClientSettings interface GetMaxUploadSize method to determine the maximum file size, in kilobytes, a user is allowed to upload. Refer to User Transfer Settings for an illustration of how this and other Client Settings Interface Methods and Properties can be accessed in the Administrator interface.
Signature:
HRESULT GetMaxUploadSize(
[out, optional] VARIANT_BOOL *pInherited,
[out, retval] long *pVal);