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Tip of the Day
Language: VB4/32,VB5,VB6
Expertise: Intermediate
Feb 24, 2001

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GetScreenSaverState, SetScreenSaverState - Enable or disable the screen saver

Private Const SPI_SETSCREENSAVEACTIVE = 17
Private Const SPI_GETSCREENSAVEACTIVE = 16
Private Const SPIF_SENDWININICHANGE = &H2
Private Const SPIF_UPDATEINIFILE = &H1

Private Declare Function SystemParametersInfo Lib "user32" Alias _
    "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, _
    ByRef lpvParam As Any, ByVal fuWinIni As Long) As Long

' return the Enabled state of the screen saver

Function GetScreenSaverState() As Boolean
    Dim result As Long
    SystemParametersInfo SPI_GETSCREENSAVEACTIVE, 0, result, 0
    GetScreenSaverState = (result <> 0)
End Function

' enable or disable the screen saver
'
' if second argument is true, it writes changes in user's profile
' returns True if the operation was successful, False otherwise

Function SetScreenSaverState(ByVal enabled As Boolean, _
    Optional ByVal PermanentChange As Boolean) As Boolean
    Dim fuWinIni As Long
    If PermanentChange Then
        fuWinIni = SPIF_SENDWININICHANGE Or SPIF_UPDATEINIFILE
    End If
    SetScreenSaverState = SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, enabled, _
        ByVal 0&, fuWinIni) <> 0
End Function


Francesco Balena
 
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