请教滚动条问题-滚到一定距离后无法再往下滚了，怎么解决？

chinaxx

如下这个例子，如果把代码30行的 GUICtrlCreateButton("a button", 10, 10, 90, 20) 这个改成 GUICtrlCreateButton("a button", 10, 700, 90, 20)后，也就是我想在座标700处显示这个按钮，那不管你怎么往下滚，都无法看到这个按钮了，难道滚动条有限制，求教这个怎么解决？

#AutoIt3Wrapper_au3check_parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
#include <GUIScrollBars.au3>
#include <ScrollBarConstants.au3>

Opt("MustDeclareVars", 1)

_Main()

Func _Main()
    Local $nFileMenu, $nExititem, $GUIMsg, $hGUI, $h_cGUI, $h_cGUI2
    Local $listview, $button

    $hGUI = GUICreate("ScrollBar Example", 400, 400, -1, -1, BitOR($WS_MINIMIZEBOX, $WS_CAPTION, $WS_POPUP, $WS_SYSMENU, $WS_SIZEBOX))
    GUISetBkColor(0x88AABB)
    
    $nFileMenu = GUICtrlCreateMenu("File")
    $nExititem = GUICtrlCreateMenuItem("Exit", $nFileMenu)
    $listview = GUICtrlCreateListView("col1  |col2|col3  ", 10, 10, 200, 150);,$LVS_SORTDESCENDING)
    $button = GUICtrlCreateButton("Value?", 75, 170, 70, 20)
    GUICtrlSetResizing($button, $GUI_DOCKALL)
    For $x = 1 To 30
        GUICtrlCreateListViewItem("item" & $x & "|col2|col3", $listview)
    Next
    GUICtrlSetResizing($listview, $GUI_DOCKALL)
    
    $h_cGUI = GUICreate("Child GUI", 200, 200, 10, 200, $WS_CHILD, $WS_EX_CLIENTEDGE, $hGUI)
    GUICtrlCreateButton("a button", 10, 10, 90, 20)
    GUISetBkColor(0X006400)
    GUISetState()
    GUICtrlSetResizing($h_cGUI, $GUI_DOCKALL)

    GUISwitch($hGUI)

    $h_cGUI2 = GUICreate("Child GUI", 200, 200, 215, 10, $WS_CHILD, $WS_EX_CLIENTEDGE, $hGUI)
    GUICtrlCreateButton("a button", 10, 10, 90, 20)
    GUISetBkColor(0X006400)
    GUISetState()
    GUICtrlSetResizing($h_cGUI2, $GUI_DOCKALL)

    GUISwitch($hGUI)

    GUIRegisterMsg($WM_SIZE, "WM_SIZE")
    GUIRegisterMsg($WM_VSCROLL, "WM_VSCROLL")
    GUIRegisterMsg($WM_HSCROLL, "WM_HSCROLL")
    
    GUISetState()

    _GUIScrollBars_Init($hGUI)
    _GUIScrollBars_Init($h_cGUI)

    While 1
        $GUIMsg = GUIGetMsg()

        Switch $GUIMsg
            Case $GUI_EVENT_CLOSE, $nExititem
                ExitLoop
        EndSwitch
    WEnd

    Exit
EndFunc   ;==>_Main

Func WM_SIZE($hWnd, $Msg, $wParam, $lParam)
    #forceref $Msg, $wParam
    Local $index = -1, $yChar, $xChar, $xClientMax, $xClient, $yClient, $ivMax
    For $x = 0 To UBound($aSB_WindowInfo) - 1
        If $aSB_WindowInfo[$x][0] = $hWnd Then
            $index = $x
            $xClientMax = $aSB_WindowInfo[$index][1]
            $xChar = $aSB_WindowInfo[$index][2]
            $yChar = $aSB_WindowInfo[$index][3]
            $ivMax = $aSB_WindowInfo[$index][7]
            ExitLoop
        EndIf
    Next
    If $index = -1 Then Return 0

    Local $tSCROLLINFO = DllStructCreate($tagSCROLLINFO)
    
    ; Retrieve the dimensions of the client area.
    $xClient = BitAND($lParam, 0x0000FFFF)
    $yClient = BitShift($lParam, 16)
    $aSB_WindowInfo[$index][4] = $xClient
    $aSB_WindowInfo[$index][5] = $yClient
    
    ; Set the vertical scrolling range and page size
    DllStructSetData($tSCROLLINFO, "fMask", BitOR($SIF_RANGE, $SIF_PAGE))
    DllStructSetData($tSCROLLINFO, "nMin", 0)
    DllStructSetData($tSCROLLINFO, "nMax", $ivMax)
    DllStructSetData($tSCROLLINFO, "nPage", $yClient / $yChar)
    _GUIScrollBars_SetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
    
    ; Set the horizontal scrolling range and page size
    DllStructSetData($tSCROLLINFO, "fMask", BitOR($SIF_RANGE, $SIF_PAGE))
    DllStructSetData($tSCROLLINFO, "nMin", 0)
    DllStructSetData($tSCROLLINFO, "nMax", 2 + $xClientMax / $xChar)
    DllStructSetData($tSCROLLINFO, "nPage", $xClient / $xChar)
    _GUIScrollBars_SetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)

    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_SIZE

Func WM_HSCROLL($hWnd, $Msg, $wParam, $lParam)
    #forceref $Msg, $lParam
    Local $nScrollCode = BitAND($wParam, 0x0000FFFF)

    Local $index = -1, $xChar, $xPos
    Local $Min, $Max, $Page, $Pos, $TrackPos

    For $x = 0 To UBound($aSB_WindowInfo) - 1
        If $aSB_WindowInfo[$x][0] = $hWnd Then
            $index = $x
            $xChar = $aSB_WindowInfo[$index][2]
            ExitLoop
        EndIf
    Next
    If $index = -1 Then Return 0
    
;~  ; Get all the horizontal scroll bar information
    Local $tSCROLLINFO = _GUIScrollBars_GetScrollInfoEx($hWnd, $SB_HORZ)
    $Min = DllStructGetData($tSCROLLINFO, "nMin")
    $Max = DllStructGetData($tSCROLLINFO, "nMax")
    $Page = DllStructGetData($tSCROLLINFO, "nPage")
    ; Save the position for comparison later on
    $xPos = DllStructGetData($tSCROLLINFO, "nPos")
    $Pos = $xPos
    $TrackPos = DllStructGetData($tSCROLLINFO, "nTrackPos")
    #forceref $Min, $Max
    Switch $nScrollCode

        Case $SB_LINELEFT ; user clicked left arrow
            DllStructSetData($tSCROLLINFO, "nPos", $Pos - 1)

        Case $SB_LINERIGHT ; user clicked right arrow
            DllStructSetData($tSCROLLINFO, "nPos", $Pos + 1)

        Case $SB_PAGELEFT ; user clicked the scroll bar shaft left of the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $Pos - $Page)

        Case $SB_PAGERIGHT ; user clicked the scroll bar shaft right of the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $Pos + $Page)

        Case $SB_THUMBTRACK ; user dragged the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $TrackPos)
    EndSwitch

;~    // Set the position and then retrieve it.  Due to adjustments
;~    //   by Windows it may not be the same as the value set.

    DllStructSetData($tSCROLLINFO, "fMask", $SIF_POS)
    _GUIScrollBars_SetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)
    _GUIScrollBars_GetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)
    ;// If the position has changed, scroll the window and update it
    $Pos = DllStructGetData($tSCROLLINFO, "nPos")
    If ($Pos <> $xPos) Then _GUIScrollBars_ScrollWindow($hWnd, $xChar * ($xPos - $Pos), 0)
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_HSCROLL

Func WM_VSCROLL($hWnd, $Msg, $wParam, $lParam)
    #forceref $Msg, $wParam, $lParam
    Local $nScrollCode = BitAND($wParam, 0x0000FFFF)
    Local $index = -1, $yChar, $yPos
    Local $Min, $Max, $Page, $Pos, $TrackPos

    For $x = 0 To UBound($aSB_WindowInfo) - 1
        If $aSB_WindowInfo[$x][0] = $hWnd Then
            $index = $x
            $yChar = $aSB_WindowInfo[$index][3]
            ExitLoop
        EndIf
    Next
    If $index = -1 Then Return 0


    ; Get all the vertial scroll bar information
    Local $tSCROLLINFO = _GUIScrollBars_GetScrollInfoEx($hWnd, $SB_VERT)
    $Min = DllStructGetData($tSCROLLINFO, "nMin")
    $Max = DllStructGetData($tSCROLLINFO, "nMax")
    $Page = DllStructGetData($tSCROLLINFO, "nPage")
    ; Save the position for comparison later on
    $yPos = DllStructGetData($tSCROLLINFO, "nPos")
    $Pos = $yPos
    $TrackPos = DllStructGetData($tSCROLLINFO, "nTrackPos")

    Switch $nScrollCode
        Case $SB_TOP ; user clicked the HOME keyboard key
            DllStructSetData($tSCROLLINFO, "nPos", $Min)

        Case $SB_BOTTOM ; user clicked the END keyboard key
            DllStructSetData($tSCROLLINFO, "nPos", $Max)

        Case $SB_LINEUP ; user clicked the top arrow
            DllStructSetData($tSCROLLINFO, "nPos", $Pos - 1)

        Case $SB_LINEDOWN ; user clicked the bottom arrow
            DllStructSetData($tSCROLLINFO, "nPos", $Pos + 1)

        Case $SB_PAGEUP ; user clicked the scroll bar shaft above the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $Pos - $Page)

        Case $SB_PAGEDOWN ; user clicked the scroll bar shaft below the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $Pos + $Page)

        Case $SB_THUMBTRACK ; user dragged the scroll box
            DllStructSetData($tSCROLLINFO, "nPos", $TrackPos)
    EndSwitch
    
;~    // Set the position and then retrieve it.  Due to adjustments
;~    //   by Windows it may not be the same as the value set.

    DllStructSetData($tSCROLLINFO, "fMask", $SIF_POS)
    _GUIScrollBars_SetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
    _GUIScrollBars_GetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
    ;// If the position has changed, scroll the window and update it
    $Pos = DllStructGetData($tSCROLLINFO, "nPos")

    If ($Pos <> $yPos) Then
        _GUIScrollBars_ScrollWindow($hWnd, 0, $yChar * ($yPos - $Pos))
        $yPos = $Pos
    EndIf

    Return $GUI_RUNDEFMSG

EndFunc   ;==>WM_VSCROLL

chinaxx

有高手回答吗

chinaxx

或者有没有其他办法可以解决的？