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The AFX_SQL_SYNC macro simply calls the function SQLFunc.
Use this macro to call ODBC API functions that will not return SQL_STILL_EXECUTING.
Before calling AFX_SQL_SYNC, you must declare a variable, nRetCode, of type RETCODE. You can check the value of nRetCode after the macro call.
Note that the implementation of AFX_SQL_SYNC changed in MFC 4.2. Because checking the server status was no longer required, AFX_SQL_SYNC simply assigns a value to nRetCode. For example, instead of making the call
you can simply make the assignment