VirtualChannelInitEvent function pointer
An application-defined callback function that Remote Desktop Services calls to notify the client DLL of virtual channel events.
The PCHANNEL_INIT_EVENT_FN type defines a pointer to this callback function. VirtualChannelInitEvent is a placeholder for the application-defined or library-defined function name.
typedef VOID ( VCAPITYPE *VirtualChannelInitEvent)( _In_ LPVOID pInitHandle, _In_ UINT event, _In_ LPVOID pData, _In_ UINT dataLength );
- pInitHandle [in]
Handle to the client connection. This is the handle returned in the ppInitHandle parameter of the VirtualChannelInit function.
- event [in]
Indicates the event that caused the notification. This parameter can be one of the following values.
- pData [in]
Pointer to additional data for the event. The type of data depends on the event, as described previously in the event descriptions.
- dataLength [in]
Specifies the size, in bytes, of the data in the pData buffer.
This function does not return a value.
The client DLL uses the VirtualChannelInit function to register its VirtualChannelInitEvent function with Remote Desktop Services.
This function is reentrant on a per-handle basis. The function may be called while it is executing, but not on the same handle more than once.
This function is called only after VirtualChannelEntry has completed.
CHANNEL_EVENT_CONNECTED and CHANNEL_EVENT_DISCONNECTED event notifications will not be sent if the connection is transferred to another session. However, the server-side plug-in that is administering the session to which the connection is transferred will receive a reconnection notification. A server-side tool such as Tscon.exe can be used to transfer connections. Refer to Monitoring Session Connections and Disconnections for more information on reconnection notifications.
If the user-mode plug-in must be notified that it has been reconnected (for example, if it must reset its state), the server-side plug-in should send a notification message to the client. This notification should use the protocol that the plug-ins use to communicate with each other.
Minimum supported client
Minimum supported server
|Windows Server 2003|