Makes a call to the RTD server, via Excel, indicating to Excel that the result of the current add-in function is dynamic.
int CallRtd( CXlOper& xloRtdResult, LPCWSTR lpszTopic );
A reference to a CXlOper object that will receive the result of the RTD call. This result is usually ignored by client applications.
A pointer to a null-terminated unicode string containing the topic to which the calling cell will be linked.
This call should be made during an add-in function that returns dynamic data. Whenever the topic's data is updated, the caller cell will be recalculated.