Notifications

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Notifications are the messages that sent to a parent window of the IM client application and notify about any events initiated by the IM server. Notifications deliver information on incoming and forwarded instant messages, changes in the user's Contact List, adding/removing assigned messaging groups, changing group permissions, etc. The handle to the window of the application that should receive these notifications is set through the IServerClientVB::Initialize function call.

Notifications are sent in the form of NOTIFY_SERVER_MESSAGE message.

Protected Overridable Sub WndProc (ByRef m As System.Windows.Forms.Message)

(m.HWnd) hParentWnd
(m.Msg) uiMessage,
(m.WParam) wParam
(m.LParam) lParam

Parameters

hParentWnd

Handle to a destination window. It should be passed as parameter to IServerClientVB::Initialize method on initializing interface and point to a form handle that will receive notifications from the IM server.

uiMessage

Identifier of the message that is always equal VBNotification.NOTIFY_SERVER_MESSAGE.

wParam

Identifier of the notification message. See available notification messages in the table below.

lParam

Contains additional information and data depending on the notification message.

Return Value

The return value specified by m.Result variable is ignored except for notification messages that specify otherwise.

The constants below are defined withinn VBNotification enum defined in the CSCLIENTLib workspace.

Notification Messages passed through wParam variable

Example

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)

    If m.Msg = VBNotification.NOTIFY_SERVER_MESSAGE Then

        Select Case m.WParam.ToInt32()

            Case VBNotification.SessionPingPong

        End Select

    End If

    MyBase.WndProc(m)

End Sub