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Tip of the Day
Language: VB4/32,VB5,VB6
Expertise: Intermediate
Jul 15, 2000

MinimizeAllWindows - Minimize and restore all windows

Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal _
    lpClassName As String, ByVal lpWindowName As String) As Long 
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal _
    hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
    lParam As Any) As Long 

Const WM_COMMAND = &H111 
Const MIN_ALL = 419 
Const MIN_ALL_UNDO = 416 

' Minimize all the windows on the desktop (and optionally restore them)
' This has the same effect as pressing the Windows+M key combination

Sub MinimizeAllWindows(Optional Restore As Boolean)
    Dim hWnd As Long
    ' get the handle of the taskbar
    hWnd = FindWindow("Shell_TrayWnd", vbNullString) 
    ' Minimize or restore all windows
    If Restore Then
        SendMessage hWnd, WM_COMMAND, MIN_ALL_UNDO, ByVal 0&
    Else
        SendMessage hWnd, WM_COMMAND, MIN_ALL, ByVal 0&
    End If
End Sub 

Francesco Balena
 
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