YieldFunctionName is a placeholder name for the application-supplied function name provided as a parameter to the RpcWinSetYieldInfo routine.
BOOL FAR PASCAL YieldFunctionName(VOID);
The callback function must retrieve messages from the message queue (including mouse and keyboard messages) and must process messages, both queued and non-queued.
YieldFunctionName should return TRUE when the application is notified that the RPC operation has completed (by receiving the wMsg message). It is an error for YieldFunctionName to return TRUE if it has not been notified that the RPC operation has completed.
YieldFunctionName should return FALSE if the user wants to cancel the RPC operation in progress. The RPC run-time library then attempts to abort the current operation, which is likely to result in the RPC call returning an error to the application. Note that due to race conditions, the operation can complete successfully even if YieldFunctionName returns FALSE.