鼠标滚轮支持、VB中数据表格类控件的滚轮支持方法

鼠标滚轮支持、VB中数据表格类控件的滚轮支持方法。

'''MSHFLEXGRID,DATAGRID,FLEXGRID等。

'''以下代码放到模块中

Option Explicit

Public Const GWL_WNDPROC = (-4)

Public Const WM_COMMAND = &H111

Public Const WM_MBUTTONDOWN = &H207

Public Const WM_MBUTTONUP = &H208

Public Const WM_MOUSEWHEEL = &H20A

Public Oldwinproc As Long

Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, _

ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, _

ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As Long, _

ByVal nIndex As Long) As Long

Public Function FlexScroll(ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

'支持滚轮的滚动 Yu 2004-5-10 15:33

Select Case wMsg

Case WM_MOUSEWHEEL

Select Case wParam

Case -7864320 '向下滚

SendKeys "{PGDN}"

Case 7864320 '向上滚

SendKeys "{PGUP}"

End Select

End Select

FlexScroll = CallWindowProc(Oldwinproc, hWnd, wMsg, wParam, lParam)

End Function

'支持滚轮鼠标API---------------------------------

'

' '将下列代码写到表格控件的GotFocus事件中

' Private Sub 控件名称_GotFocus()

' Oldwinproc = GetWindowLong(Me.hWnd, GWL_WNDPROC)

' SetWindowLong Me.hWnd, GWL_WNDPROC, AddressOf FlexScroll

' End Sub

'

' '将下列代码写到表格控件的LostFocus事件中

' Private Sub 控件名称_LostFocus()

' SetWindowLong Me.hWnd, GWL_WNDPROC, Oldwinproc

' End Sub