changing system colours

i am trying to temporarily change a system colour and then change it back when the probram ends however all the SetSysColors seems to do is return a number it doesnt change any system colours or anything heres all the code for the system colour change

   Declare Function SetSysColors Lib "user32" Alias "SetSysColors" (ByVal nChanges As Long, ByVal lpSysColor As Long, ByVal lpColorValues As Long) As Long

    Public Const COLOR_SCROLLBAR = 0 'The Scrollbar colour 
    Public Const COLOR_BACKGROUND = 1 'Colour of the background with no wallpaper 
    Public Const COLOR_ACTIVECAPTION = 2 'Caption of Active Window 
    Public Const COLOR_INACTIVECAPTION = 3 'Caption of Inactive window 
    Public Const COLOR_MENU = 4 'Menu 
    Public Const COLOR_WINDOW = 5 'Windows background 
    Public Const COLOR_WINDOWFRAME = 6 'Window frame 
    Public Const COLOR_MENUTEXT = 7 'Window Text 
    Public Const COLOR_WINDOWTEXT = 8 '3D dark shadow (Win95) 
    Public Const COLOR_CAPTIONTEXT = 9 'Text in window caption 
    Public Const COLOR_ACTIVEBORDER = 10 'Border of active window 
    Public Const COLOR_INACTIVEBORDER = 11 'Border of inactive window 
    Public Const COLOR_APPWORKSPACE = 12 'Background of MDI desktop 
    Public Const COLOR_HIGHLIGHT = 13 'Selected item background 
    Public Const COLOR_HIGHLIGHTTEXT = 14 'Selected menu item 
    Public Const COLOR_BTNFACE = 15 'Button 
    Public Const COLOR_BTNSHADOW = 16 '3D shading of button 
    Public Const COLOR_GRAYTEXT = 17 'Grey text, of zero if dithering is used. 
    Public Const COLOR_BTNTEXT = 18 'Button text 
    Public Const COLOR_INACTIVECAPTIONTEXT = 19 'Text of inactive window 
    Public Const COLOR_BTNHIGHLIGHT = 20 '3D highlight of button 
    Public Const COLOR_2NDACTIVECAPTION = 27 'Win98 only: 2nd active window color
    Public Const COLOR_2NDINACTIVECAPTION = 28 'Win98 only: 2nd inactive window color

    Public Commands As String = Command()

    Public Sub ChangeSystemColour(ByVal Red As Integer, ByVal Green As Integer, ByVal Blue As Integer)
        varColourChanged = True ' System Colours have Changed
        SetSysColors(1, COLOR_WINDOW, RGB(Red, Green, Blue))
    End Sub