Display setting finding by vbscript

The sample script demonstrates how to get and set display settings (the pixels resolution and color depth).
Sub Test
    Call SetDisplay(800, 600, 32)
    LogDisplayProperties()
    Call SetDisplay(1024, 768, 32)
    LogDisplayProperties()
End Sub

' The function changes the display settings:
' x - resolution
' y - resolution
' d - color depth
Function SetDisplay(x, y, d)
     Dim dm
     Dim res

     Set dm = Win32API.DEVMODE
     If (Win32API.EnumDisplaySettings(VarToInteger(0), -1, dm) <> 0) Then
         dm.dmPelsWidth = x
         dm.dmPelsHeight = y
         dm.dmBitsPerPel = d
        
         res = Win32API.ChangeDisplaySettings(dm, 0)
         If (res = DISP_CHANGE_BADMODE) Then
            Call Log.Error("A call to the ChangeDisplaySettings() function failed" &_
                  " in the SetDisplay() function.", "The specified graphics mode" &_
                  " (screen resolution: " & x & "*" & y & "; color depth: " & d &_
                  " bits per pixel) is not supported.", pmLower)
         End If
         SetDisplay = res
     Else
         Dim dwLastError
         dwLastError = Win32API.GetLastError()
         Call Log.Error("A call to the EnumDisplaySettings() failed" &_
                       " in the SetDisplay() function.", "System error code: " &_
                       dwLastError & " (" &_
                       Utilities.SysErrorMessage(dwLastError) &")", pmLower)
         SetDisplay = -1
     End If
End Function

Sub LogDisplayProperties
  Dim dm

  Set dm = Win32API.DEVMODE
  If (Win32API.EnumDisplaySettings(VarToInteger(0), -1, dm) <> 0) Then
    Log.AppendFolder("Current display settings")
    Log.Message("Width: " & dm.dmPelsWidth)
    Log.Message("Height: " & dm.dmPelsHeight)
    Log.Message("Bits: " & dm.dmBitsPerPel)
    Log.PopLogFolder()
  End If
End Sub