Use the ICICommandSettings interface RequireParams property to check if a custom command must have parameters. Use the same property to require or parameters, or to allow custom commands without parameters. Refer to Command Settings Interface Properties for an illustration of how this and other ICICommandSettings can be accessed in the Administrator interface.
Signature:
HRESULT RequireParams([out, retval] VARIANT_BOOL *pVal);
HRESULT RequireParams([in] VARIANT_BOOL newVal);