The [notify] attribute instructs the MIDL compiler to generate a call to a [notify] procedure on the server side of the application.
The name of the remote procedure with which the notify procedure will be associated.
The [notify] procedure called as a result of the [notify] attribute is associated with a particular remote procedure on the server. It is similar in concept to a callback function. The stub calls the [notify] procedure after all the output arguments of the remote procedure with which it is associated have been marshaled and any memory associated with the parameters is freed. The [notify] routine is called if a call fails before the server routine executes. For example, if a server fails during unmarshaling due to receipt of bad data from the client, the [notify] routine is called.
The [notify] attribute is useful to develop applications acquiring resources in remote procedures. These resources are then freed in the [notify] procedure after the output parameters of the remote procedure are fully marshaled.
The [notify] procedure name is the name of the remote procedure suffixed by _notify. The _notify procedure does not require any parameters and does not return a result. A prototype of this procedure is also generated in the header file. For example, if the IDL file contains the following:
MyProcedure([in] short S);
Specify the following in the ACF for MIDL to generate the _notify call:
The MIDL compiler will generate server stub code which contains the following call to the _notify procedure:
The header file will contain a prototype: