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Posez votre questionPrivate Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long Const SW_SHOWNORMAL = 1 Const WM_CLOSE = &H10 Const gcClassnameMSWord = "OpusApp" Const gcClassnameMSExcel = "XLMAIN" Const gcClassnameMSIExplorer = "IEFrame" Const gcClassnameMSVBasic = "wndclass_desked_gsk" Const gcClassnameNotePad = "Notepad" Const gcClassnameMyVBApp = "ThunderForm" Private Sub Form_Load() 'KPD-Team 1998 'URL: http://www.allapi.net/ 'E-Mail: KPDTeam@Allapi.net Dim WinWnd As Long, Ret As String, RetVal As Long, lpClassName As String 'Ask for a Window title Ret = InputBox("Enter the exact window title:" + Chr$(13) + Chr$(10) + "Note: must be an exact match") 'Search the window WinWnd = FindWindow(vbNullString, Ret) If WinWnd = 0 Then MsgBox "Couldn't find the window ...": Exit Sub 'Show the window ShowWindow WinWnd, SW_SHOWNORMAL 'Create a buffer lpClassName = Space(256) 'retrieve the class name RetVal = GetClassName(WinWnd, lpClassName, 256) 'Show the classname MsgBox "Classname: " + Left$(lpClassName, RetVal) 'Post a message to the window to close itself PostMessage WinWnd, WM_CLOSE, 0&, 0& End Sub