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声明：
Private Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg _
As Long, ByVal wParam As Long, ByVal lParam As Long) _
As Long
Const WM_SYSCOMMAND = &H112&
Const SC_SCREENSAVE = &HF140&
代码：
Dim result As Long
result = SendMessage(Form1.hWnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0&)
Private Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg _
As Long, ByVal wParam As Long, ByVal lParam As Long) _
As Long
Const WM_SYSCOMMAND = &H112&
Const SC_SCREENSAVE = &HF140&
代码：
Dim result As Long
result = SendMessage(Form1.hWnd, WM_SYSCOMMAND, SC_SCREENSAVE, 0&)
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