RpcServerUnregisterIf function (rpcdce.h)

The RpcServerUnregisterIf function removes an interface from the RPC run-time library registry.


RPC_STATUS RpcServerUnregisterIf(
  UUID          *MgrTypeUuid,
  unsigned int  WaitForCallsToComplete



Interface to remove from the registry.

Specify a null value to remove all interfaces previously registered with the type UUID value specified in the MgrTypeUuid parameter.


Pointer to the type UUID of the manager entry-point vector (EPV) to remove from the registry. The value of MgrTypeUuid should be the same value as was provided in a call to the RpcServerRegisterIf function, RpcServerRegisterIf2 function, or the RpcServerRegisterIfEx function.

Specify a null value to remove the interface specified in the IfSpec parameter for all previously registered type UUIDs from the registry.

Specify a nil UUID to remove the MIDL-generated default manager EPV from the registry. In this case, all manager EPVs registered with a non-nil type UUID remain registered.


Flag that indicates whether to remove the interface from the registry immediately or to wait until all current calls are complete.

Specify a value of zero to disregard calls in progress and remove the interface from the registry immediately. Specify any nonzero value to wait until all active calls complete.

Return value

Value Meaning
The call succeeded.
The manager type is unknown.
The interface is unknown.
Note  For a list of valid error codes, see RPC Return Values.


A server calls RpcServerUnregisterIf to remove the association between an interface and a manager EPV. To specify the manager EPV to remove in the MgrTypeUuid parameter, provide the type UUID value that was specified in a call to RpcServerRegisterIf. After it is removed from the registry, an interface is no longer available to client applications.

When an interface is removed from the registry, the RPC run-time library stops accepting new calls for that interface. Calls that are currently executing on the interface are allowed to complete, including callbacks.

The following table summarizes the behavior of RpcServerUnregisterIf.

IfSpec MgrTypeUuid Behavior
Non-null Non-null Removes from the registry the manager EPV associated with the specified parameters.
Non-null NULL Removes all manager EPVs associated with the IfSpec parameter.
NULL Non-null Removes all manager EPVs associated with the MgrTypeUuid parameter.
NULL NULL Removes all manager EPVs. This call has the effect of preventing the server from receiving any new remote procedure calls because all the manager EPVs for all interfaces have been unregistered.
Note  If the value of IfSpec is NULL, this function will leave auto-listen interfaces registered. Auto-listen interfaces must be removed from the registry individually. See RpcServerRegisterIfEx for more details.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header rpcdce.h (include Rpc.h)
Library Rpcrt4.lib
DLL Rpcrt4.dll

See also


Registering Interfaces