BOOL IsFieldType( UINT* pnField );
Return Value
Nonzero if the current operation can be performed on the current field or parameter type.
Parameters
pnField
The sequential number of the field or parameter data member is returned in this parameter. This number corresponds to the data member’s order in the CRecordset::DoFieldExchange or CRecordset::DoBulkFieldExchange function.
Remarks
If you write your own RFX function, call IsFieldType at the beginning of your function to determine whether the current operation can be performed on a particular field or parameter data member type (a CFieldExchange::outputColumn, CFieldExchange::inputParam, CFieldExchange::param, CFieldExchange::outputParam, or CFieldExchange::inoutParam). Follow the model of the existing RFX functions.