How to Detect if Screensaver is active

I want to know if the screensaver is active.

I have continues polling that I want to turn off while the screensaver is active and resume the polling when the screensaver is deactivated.

I'm using express 2008 and Windows XP

Please advice.

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You can use "user32.dll" and call SystemParametersInfo

you can see c# code here:

you can also see at:

hope this helps.

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Ola3Author Commented:


I rewrote it to

Public Class Form1

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

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

        Dim SPI_GETSCREENSAVERRUNNING As Integer = 114
        Dim screenSaverRunning As Integer = -1

        Dim ok As Integer = SystemParametersInfo(SPI_GETSCREENSAVERRUNNING, 0, screenSaverRunning, 0)

        If ok = 0 Then
            Debug.Write("Failed" & vbCrLf)
        ElseIf (screenSaverRunning = 0) Then
            Debug.Write("Screensaver OFF" & vbCrLf)
            Debug.Write("Screensaver ON" & vbCrLf)
        End If

    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    End Sub
End Class

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Great! excelent solution! :)
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