CDatabase::Cancel
Call this member function to request that the data source cancel either an asynchronous operation in progress or a process from a second thread.
void Cancel( );
Remarks
Note that the MFC ODBC classes no longer use asynchronous processing; to perform an asychronous operation, you must directly call the ODBC API function SQLSetConnectOption. For more information, see Asynchronous Execution in the Windows SDK.
Requirements
Header: afxdb.h