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关于平面滚动条的问题!

Const WS_VSCROLL = &H200000
Const WS_HSCROLL = &H100000
Const GWL_STYLE = (-16)

Const WSB_PROP_CYVSCROLL = &H1
Const WSB_PROP_CXHSCROLL = &H2
Const WSB_PROP_CYHSCROLL = &H4
Const WSB_PROP_CXVSCROLL = &H8
Const WSB_PROP_CXHTHUMB = &H10
Const WSB_PROP_CYVTHUMB = &H20
Const WSB_PROP_VBKGCOLOR = &H40
Const WSB_PROP_HBKGCOLOR = &H80
Const WSB_PROP_VSTYLE = &H100
Const WSB_PROP_HSTYLE = &H200
Const WSB_PROP_WINSTYLE = &H400
Const WSB_PROP_PALETTE = &H800
Const WSB_PROP_MASK = &HFFF
Const FSB_FLAT_MODE = 2
Const FSB_ENCARTA_MODE = 1
Const FSB_REGULAR_MODE = 0

Const SB_HORZ = 0
Const SB_VERT = 1
Const SB_BOTH = 3

Const ESB_ENABLE_BOTH = &H0
Const ESB_DISABLE_BOTH = &H3
Const ESB_DISABLE_LEFT = &H1
Const ESB_DISABLE_RIGHT = &H2
Const ESB_DISABLE_UP = &H1
Const ESB_DISABLE_DOWN = &H2
Const ESB_DISABLE_LTUP = ESB_DISABLE_LEFT
Const ESB_DISABLE_RTDN = ESB_DISABLE_RIGHT

Const SIF_RANGE = &H1
Const SIF_PAGE = &H2
Const SIF_POS = &H4
Const SIF_ALL = (SIF_RANGE Or SIF_PAGE Or SIF_POS)

Private Type SCROLLINFO
    cbSize As Long
    fMask As Long
    nMin As Long
    nMax As Long
    nPage As Long
    nPos As Long
    nTrackPos As Long
End Type
Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function InitializeFlatSB Lib "comctl32" (ByVal hWnd As Long) As Long
Private Declare Function UninitializeFlatSB Lib "comctl32" (ByVal hWnd As Long) As Long
Private Declare Function FlatSB_SetScrollProp Lib "comctl32" (ByVal hWnd As Long, ByVal index As Long, ByVal newValue As Long, ByVal fRedraw As Boolean) As Boolean
Private Declare Function FlatSB_EnableScrollBar Lib "comctl32" (ByVal hWnd As Long, ByVal wSBflags As Long, ByVal wArrows As Long) As Long
Private Declare Function FlatSB_GetScrollInfo Lib "comctl32" (ByVal hWnd As Long, ByVal fnBar As Long, lpsi As SCROLLINFO) As Boolean
Private Declare Function FlatSB_GetScrollProp Lib "comctl32" (ByVal hWnd As Long, ByVal index As Long, pValue As Long) As Boolean
Private Declare Function FlatSB_GetScrollRange Lib "comctl32" (ByVal hWnd As Long, ByVal code As Long, lpMinPos As Long, lpMaxPos As Long) As Boolean
Private Declare Function FlatSB_SetScrollInfo Lib "comctl32" (ByVal hWnd As Long, ByVal fnBar As Long, lpsi As SCROLLINFO, ByVal fRedraw As Boolean) As Long
Private Declare Function FlatSB_SetScrollPos Lib "comctl32" (ByVal hWnd As Long, ByVal code As Long, ByVal nPos As Long, ByVal fRedraw As Boolean) As Long
Private Declare Function FlatSB_SetScrollRange Lib "comctl32" (ByVal hWnd As Long, ByVal code As Long, ByVal nMinPos As Long, ByVal nMaxPos As Long, ByVal fRedraw As Boolean) As Long
Private Declare Function FlatSB_ShowScrollBar Lib "comctl32" (ByVal hWnd As Long, ByVal code As Long, ByVal fShow As Boolean) As Boolean
Private Declare Function FlatSB_GetScrollPos Lib "comctl32" (ByVal hWnd As Long, ByVal code As Long) As Long
Private Sub Form_Activate()
    Dim SI As SCROLLINFO
    'Initialize
    InitializeFlatSB Me.hWnd
    'Set the vertical scrollbar to Encarta-mode
    FlatSB_SetScrollProp Me.hWnd, WSB_PROP_VSTYLE, FSB_ENCARTA_MODE, False
    'Disable the Up-button from the vertical scrollbar
    FlatSB_EnableScrollBar Me.hWnd, SB_VERT, ESB_DISABLE_UP
    'Set the vertical scroll range
    FlatSB_SetScrollRange Me.hWnd, SB_VERT, 20, 80, False
    'Set the scroll position to 50
    FlatSB_SetScrollPos Me.hWnd, SB_VERT, 60, False
    'Hide the horizontal scrollbar
    FlatSB_ShowScrollBar Me.hWnd, SB_HORZ, False
    'Get the scrollbar information
    SI.cbSize = Len(SI)
    SI.fMask = SIF_ALL
    FlatSB_GetScrollInfo Me.hWnd, SB_VERT, SI
    SI.nPos = SI.nPos - 10
    'Set the new scrollbar information
    FlatSB_SetScrollInfo Me.hWnd, SB_VERT, SI, True
    'Show some scrollbar information on the form
    Dim RetMin As Long, RetMax As Long
    FlatSB_GetScrollRange Me.hWnd, SB_VERT, RetMin, RetMax
    Me.AutoRedraw = True
    Me.Print "Scroll Position:" + Str$(Int(100 * (FlatSB_GetScrollPos(Me.hWnd, SB_VERT) / RetMax))) + "%"
    FlatSB_GetScrollProp Me.hWnd, WSB_PROP_VSTYLE, RetMin
    Me.Print "Vertical Scrollbar Mode:" + Str$(RetMin)
End Sub
Private Sub Form_Load()
    'KPD-Team 2000
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    Dim Ret As Long
    'Create the scrollbars on the form
    Ret = GetWindowLong(Me.hWnd, GWL_STYLE)
    Ret = Ret Or WS_VSCROLL Or WS_HSCROLL
    SetWindowLong Me.hWnd, GWL_STYLE, Ret
End Sub
Private Sub Form_Unload(Cancel As Integer)
    'Remove the Flat style
    UninitializeFlatSB Me.hWnd
End Sub
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