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Imports System.Runtime.InteropServices
Public Class Form1
Public Class MSNStatusMessage
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" ( _
ByVal hWnd1 As Integer, _
ByVal hWnd2 As Integer, _
ByVal lpsz1 As String, _
ByVal lpsz2 As String) _
As Integer
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" ( _
ByVal Hwnd As Integer, _
ByVal wMsg As Integer, _
ByVal wParam As Integer, _
ByVal lParam As Integer) _
As Integer
Private Const WM_COPYDATA As Short = 74
Private Structure COPYDATASTRUCT
Public dwData As Integer
Public cbData As Integer
Public lpData As Integer
End Structure
Public Enum EnumCategory As Integer
Music = 0
Games = 1
Office = 2
End Enum
Public Shared Sub SendStatusMessage(ByVal Enable As Boolean, ByVal Category As EnumCategory, Optional ByVal Message As String = "")
Dim Data As COPYDATASTRUCT
Dim Buffer As String = "\0" & Category.ToString + "\0" & IIf(Enable, "1", "0") & "\0{0}\0" & Message & "\0\0\0\0" & Chr(0) & ""
Dim Handle As Integer = 0
Data.dwData = 1351
Data.lpData = VarPtr(Buffer)
Data.cbData = Buffer.Length * 2
Handle = FindWindowEx(0, Handle, "MsnMsgrUIManager", Nothing)
If Handle > 0 Then
SendMessage(Handle, WM_COPYDATA, 0, VarPtr(Data))
End If
End Sub
Private Shared Function VarPtr(ByVal e As Object) As Integer
Dim GC As GCHandle = GCHandle.Alloc(e, GCHandleType.Pinned)
Dim GC2 As Integer = GC.AddrOfPinnedObject.ToInt32
GC.Free()
Return GC2
End Function
End Class
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MSNStatusMessage.SendStatusMessage(True, MSNStatusMessage.EnumCategory.Music, "test")
End Sub
End Class
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