The WTSWaitSystemEvent function waits for a Remote Desktop Services event before returning to the caller.

Syntax

BOOL WTSWaitSystemEvent(
  __in   HANDLE hServer,
  __in   DWORD EventMask,
  __out  DWORD *pEventFlags
);

Parameters

hServer [in]

Handle to an RD Session Host server. Specify a handle opened by the WTSOpenServer function, or specify WTS_CURRENT_SERVER_HANDLE to indicate the RD Session Host server on which your application is running.

EventMask [in]

Bitmask that specifies the set of events to wait for. This mask can be WTS_EVENT_FLUSH to cause all pending WTSWaitSystemEvent calls on the specified RD Session Host server handle to return. Or, the mask can be a combination of the following values.

Value	Meaning
WTS_EVENT_ALL	Wait for any event type.
WTS_EVENT_CONNECT	A client connected to a WinStation.
WTS_EVENT_CREATE	A new WinStation was created.
WTS_EVENT_DELETE	An existing WinStation was deleted.
WTS_EVENT_DISCONNECT	A client disconnected from a WinStation.
WTS_EVENT_LICENSE	The Remote Desktop Services's license state changed. This occurs when a license is added or deleted using License Manager.
WTS_EVENT_LOGOFF	A user logged off from either the Remote Desktop Services console or from a client WinStation.
WTS_EVENT_LOGON	A user logged on to the system from either the Remote Desktop Services console or from a client WinStation.
WTS_EVENT_RENAME	An existing WinStation was renamed.
WTS_EVENT_STATECHANGE	A WinStation connection state changed. For a list of connection states, see the WTS_CONNECTSTATE_CLASS enumeration type.

 

pEventFlags [out]

Pointer to a variable that receives a bitmask of the event or events that occurred. The returned mask can be a combination of the values from the previous table, or it can be WTS_EVENT_NONE if the wait terminated because of a WTSWaitSystemEvent call with WTS_EVENT_FLUSH.

Return Value

If the function succeeds, the return value is a nonzero value.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Requirements

See Also

WTSOpenServer

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Build date: 10/19/2009