Registers a callback pointer for the specified event.
RegisterActionOnEvent returned successfully.
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.
The call timed out.
The caller does not own the lock.
An event was canceled while a blocked thread or fiber was waiting on it.
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.