Application to move mouse

      Windows.Forms.Cursor.Position = New System.Drawing.Point(Windows.Forms.Cursor.Position.X + 1, Windows.Forms.Cursor.Position.Y + 1)

Disable the screen saver instead;

Imports Microsoft.Win32


'// This goes on form_load

'// Reads and sets the registry to disable screensaver from kicking
Dim regKey As RegistryKey
Dim regVal As String
regKey = Registry.CurrentUser.OpenSubKey("Control Panel\Desktop", True)
regVal = regKey.GetValue("ScreenSaveActive")
If regVal = 1 Then
regKey.SetValue("ScreenSaveActive", "0")
End If
regKey.Close()


'//This goes on app exit

'// Reads and sets the registry to re-enable screensaver
Dim regKey As RegistryKey
Dim regVal As String
regKey = Registry.CurrentUser.OpenSubKey("Control Panel\Desktop", True)
regVal = regKey.GetValue("ScreenSaveActive")
If regVal = 0 Then
regKey.SetValue("ScreenSaveActive", "1")
End If
regKey.Close()


OR Do like this:
Microsoft.Win32.RegistryKey rkScreenSaver = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"  Control Panel\Desktop", true );

if ( (string)rkScreenSaver.GetValue( "ScreenSaveActive" ) == "1" )
{
rkScreenSaver.SetValue( "ScreenSaveActive", "0" );
rkScreenSaver.Close( );
}

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In the example above which I never mentioned you would periodically call SetThreadExecutionState() once every minute is fine. When your finished and you want it to go back to normal use SetThreadExecutionState(ES_CONTINUOUS).

Thanks for posting that one egl1044.  Learned something new today!  =D

No problem Idle_Mind it's very useful for background processing.  I would like to also point out is that I have always called this routine periodically but it's appears only neccessary if you use only ES_CONTINUOUS flag.
If you use both flags ES_CONTINUOUS | ES_DISPLAY_REQUIRED it locks the Idle counter all together until you remove the ES_DISPLAY_REQUIRED bit flag. That means with the two flags you only need call it once but periodically if using only ES_CONTINUOUS.
When I started using this the documentation wasn't the same from a couple years ago but they seem to have improved it over time with much better descriptions.

Whoops the above should read
If you use SetThreadExecutionState without* ES_CONTINUOUS flag.
That means with the two flags you only need call it once but periodically if using SetThreadExecutionState without* ES_CONTINUOUS flag.
<Fills up more coffee>...