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Call this member function to set the parameter to a Null value.
void SetParamValueNull(
int nIndex
);
void SetParamValueNull(
LPCTSTR lpszName
);
Parameters
nIndex
The index of the field in the recordset, for lookup by zero-based index.lpszName
The name of the field in the recordset, for lookup by name.
Remarks
C++ NULL is not the same as Null, which, in database terminology, means "having no value."
Requirements
Header: afxdao.h