'首先,在Project中加入一个Module文件;然后,在Module中加入以下代码: Public Declare Function EnumWindows Lib "user32" _ (ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" _ (ByVal hwnd As Long, ByVal nIndex As Long) As Long Declare Function ShowWindow Lib "user32" (ByVal _ hwnd As Long, ByVal nCmdShow As Long) As Long Public Const WS_MINIMIZEBOX = &H20000
Public Const WS_VISIBLE = &H10000000 Public Const GWL_STYLE = (-16) Public Const SW_MINIMIZE = 6 '该函数是EnumWindows的回调函数, 'EnumWindows函数将遍历的窗口句柄传递到hwnd参数中 Function EnumWindowsProc(ByVal hwnd As Long, ByVal lParam As Long) As Long Dim l As Long Dim ld As Long ld = GetWindowLong(hwnd, GWL_STYLE) '如果窗口具有最小化按钮并且窗口是可见的就将该窗口最小化 If ((ld And WS_MINIMIZEBOX) = WS_MINIMIZEBOX) Then If ((ld And WS_VISIBLE)) Then If ShowWindow(hwnd, SW_MINIMIZE) Then End If End If End If EnumWindowsProc = True End Function '然后在Form1中添加一个CommandButton,并在Form1的代码窗口中添加以下代码: Private Sub Command1_Click() Dim l As Long '遍历所有的窗口 l = EnumWindows(AddressOf EnumWindowsProc, 0) End Sub '运行上面的程序,点击CommandButton,桌面上的所有窗口就会被最小化。在上面的例程中,我们首先调用EnumWinodws函数遍历所有的窗口,每当函数遍历到一个窗口,它就调用一次参数lpEnumFunc指定的窗口处理函数并将这个窗口的句柄传递到窗口处理函数中,以便让它处理。那么,我们就只要在窗口处理函数中使用GetwindowLong函数来获得并判断窗口的类型,如果窗口是可见的,并且窗口具有最小化按钮,则将窗口最小化。
将以上例程改为最大化即可,常数定义: Public Const WS_MAXIMIZEBOX = &H10000 '最大化
'这个简单 Private Sub Form_Resize() If Me.WindowState = 1 Then Me.WindowState = 2 End If End Sub
Private Declare Function ShowWindow Lib "user32.dll" (ByVal hwnd As Long,ByVal nCmdShow As Long) As LongPrivate Const SW_MAXIMIZE As Long = 3Private Sub Form_Load() ShowWindow Me.hwnd, SW_MAXIMIZE
(ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long
Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" _
(ByVal hwnd As Long, ByVal nIndex As Long) As Long
Declare Function ShowWindow Lib "user32" (ByVal _
hwnd As Long, ByVal nCmdShow As Long) As Long Public Const WS_MINIMIZEBOX = &H20000
Public Const WS_VISIBLE = &H10000000
Public Const GWL_STYLE = (-16)
Public Const SW_MINIMIZE = 6 '该函数是EnumWindows的回调函数,
'EnumWindows函数将遍历的窗口句柄传递到hwnd参数中
Function EnumWindowsProc(ByVal hwnd As Long, ByVal lParam As Long) As Long
Dim l As Long
Dim ld As Long
ld = GetWindowLong(hwnd, GWL_STYLE)
'如果窗口具有最小化按钮并且窗口是可见的就将该窗口最小化
If ((ld And WS_MINIMIZEBOX) = WS_MINIMIZEBOX) Then
If ((ld And WS_VISIBLE)) Then
If ShowWindow(hwnd, SW_MINIMIZE) Then
End If
End If
End If
EnumWindowsProc = True
End Function '然后在Form1中添加一个CommandButton,并在Form1的代码窗口中添加以下代码: Private Sub Command1_Click()
Dim l As Long
'遍历所有的窗口
l = EnumWindows(AddressOf EnumWindowsProc, 0)
End Sub '运行上面的程序,点击CommandButton,桌面上的所有窗口就会被最小化。在上面的例程中,我们首先调用EnumWinodws函数遍历所有的窗口,每当函数遍历到一个窗口,它就调用一次参数lpEnumFunc指定的窗口处理函数并将这个窗口的句柄传递到窗口处理函数中,以便让它处理。那么,我们就只要在窗口处理函数中使用GetwindowLong函数来获得并判断窗口的类型,如果窗口是可见的,并且窗口具有最小化按钮,则将窗口最小化。
Public Const WS_MAXIMIZEBOX = &H10000 '最大化
Private Sub Form_Resize()
If Me.WindowState = 1 Then
Me.WindowState = 2
End If
End Sub
End Sub
根本不需api