Problem with GetScrollPos

Declare Function GetScrollPos Lib "user32" (ByVal hwnd As Long, ByVal nBar As Long) As Long

Hi, i'm using this API with W98 and it runs perfectly.

But when i try the same program with the same code in Windows 2000, the function GetScrollPos doesn´t run.

What's the problem, ?
Is there any API function that gives me the same funcionality? Why Microsoft want to **** developers?

I want to know if in w2000 are more changes in API functions,

Bye Bye , hasta luego !!!

Use GetScrollInfo API instead. Here is a little example with RichTextBox:

VB Code:

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 SetScrollInfo Lib "user32" (ByVal hwnd As Long, ByVal n As Long, lpcScrollInfo As SCROLLINFO, ByVal bool As Boolean) As Long
Private Declare Function GetScrollInfo Lib "user32" (ByVal hwnd As Long, ByVal n As Long, lpScrollInfo As SCROLLINFO) As Long
Private Const SB_HORZ = 0
Private Const SB_VERT = 1
Private Const SIF_RANGE = &H1
Private Const SIF_PAGE = &H2
Private Const SIF_POS = &H4
Private Const SIF_DISABLENOSCROLL = &H8
Private Const SIF_TRACKPOS = &H10
Private Const SIF_ALL = (SIF_RANGE Or SIF_PAGE Or SIF_POS Or SIF_TRACKPOS)
 
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_VSCROLL = &H115
Private Const SB_LINEUP = 0
Private Const SB_LINEDOWN = 1
 
Private Sub Command1_Click()
    Dim si As SCROLLINFO
    Dim strMsg As String
    Dim lngRet As Long
    
    With si
        .cbSize = Len(si)
        .fMask = SIF_POS
    
        lngRet = GetScrollInfo(RichTextBox1.hwnd, SB_VERT, si)
        If lngRet <> 0 Then
            strMsg = "Scrollbar information:" & vbCrLf
            strMsg = strMsg & "Min: " & .nMin & vbCrLf
            'the actual MAX value is nMax + nPage
            strMsg = strMsg & "Max: " & .nMax + .nPage & vbCrLf
            strMsg = strMsg & "Current Position: " & .nPos
        Else
            strMsg = "Error getting scrollbar position."
        End If
    End With
    
    MsgBox strMsg
End Sub
 
Private Sub Command2_Click()
    'you can scroll line by line
    SendMessage RichTextBox1.hwnd, WM_VSCROLL, SB_LINEDOWN, ByVal 0
    'or you can use SetScrollInfo API to set the absolute position of the scrollbar
End Sub

Hi, can this code be modded sothat I can see the scroll position for any active window/the foeground window. Hope you can help.
Thanks

Quote:

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Originally Posted by Serge

Use GetScrollInfo API instead. Here is a little example with RichTextBox:

VB Code:

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 SetScrollInfo Lib "user32" (ByVal hwnd As Long, ByVal n As Long, lpcScrollInfo As SCROLLINFO, ByVal bool As Boolean) As Long
Private Declare Function GetScrollInfo Lib "user32" (ByVal hwnd As Long, ByVal n As Long, lpScrollInfo As SCROLLINFO) As Long
Private Const SB_HORZ = 0
Private Const SB_VERT = 1
Private Const SIF_RANGE = &H1
Private Const SIF_PAGE = &H2
Private Const SIF_POS = &H4
Private Const SIF_DISABLENOSCROLL = &H8
Private Const SIF_TRACKPOS = &H10
Private Const SIF_ALL = (SIF_RANGE Or SIF_PAGE Or SIF_POS Or SIF_TRACKPOS)
 
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_VSCROLL = &H115
Private Const SB_LINEUP = 0
Private Const SB_LINEDOWN = 1
 
Private Sub Command1_Click()
    Dim si As SCROLLINFO
    Dim strMsg As String
    Dim lngRet As Long
    
    With si
        .cbSize = Len(si)
        .fMask = SIF_POS
    
        lngRet = GetScrollInfo(RichTextBox1.hwnd, SB_VERT, si)
        If lngRet <> 0 Then
            strMsg = "Scrollbar information:" & vbCrLf
            strMsg = strMsg & "Min: " & .nMin & vbCrLf
            'the actual MAX value is nMax + nPage
            strMsg = strMsg & "Max: " & .nMax + .nPage & vbCrLf
            strMsg = strMsg & "Current Position: " & .nPos
        Else
            strMsg = "Error getting scrollbar position."
        End If
    End With
    
    MsgBox strMsg
End Sub
 
Private Sub Command2_Click()
    'you can scroll line by line
    SendMessage RichTextBox1.hwnd, WM_VSCROLL, SB_LINEDOWN, ByVal 0
    'or you can use SetScrollInfo API to set the absolute position of the scrollbar
End Sub

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