ICLROnEventManager::RegisterActionOnEvent Method

Registers a callback pointer for the specified event.


HRESULT RegisterActionOnEvent (  
    [in] EClrEvent event,  
    [in] IActionOnCLREvent *pAction  


[in] One of the EClrEvent values, indicating the event for which to register the callback pointer described by pAction.

[in] A pointer to an IActionOnCLREvent object that is called when the registered event fires.

Return Value

HRESULT Description
S_OK RegisterActionOnEvent returned successfully.
HOST_E_CLRNOTAVAILABLE The common language runtime (CLR) has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.
HOST_E_TIMEOUT The call timed out.
HOST_E_NOT_OWNER The caller does not own the lock.
HOST_E_ABANDONED An event was canceled while a blocked thread or fiber was waiting on it.
E_FAIL An unknown catastrophic failure occurred. After a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.


The host can register callbacks for either or both of the two event types described by EClrEvent. The host gets the ICLROnEventManager interface by calling the ICLRControl::GetCLRManager method.


The events that RegisterActionOnEvent registers can be fired more than once and from different threads to signal an unload or the disabling of the CLR.


Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See Also

EClrEvent Enumeration
IActionOnCLREvent Interface
ICLRControl Interface
ICLROnEventManager Interface