‘modMouseWheel.bas
Private Declare Function CallWindowProc Lib "user32.dll" Alias "CallWindowProcA" ( _
ByVal lpPrevWndFunc As Long, _
ByVal hWnd As Long, _
ByVal Msg As Long, _
ByVal Wparam As Long, _
ByVal Lparam As Long) As Long
Private Declare Function SetWindowLong Lib "user32.dll" Alias "SetWindowLongA" ( _
ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long
Public Const MK_CONTROL = &H8
Public Const MK_LBUTTON = &H1
Public Const MK_RBUTTON = &H2
Public Const MK_MBUTTON = &H10
Public Const MK_SHIFT = &H4
Private Const GWL_WNDPROC = -4
Private Const WM_MOUSEWHEEL = &H20A
Dim LocalHwnd As Long
Dim LocalPrevWndProc As Long
Dim MyForm As Form
Private Function WindowProc(ByVal Lwnd As Long, ByVal Lmsg As Long, ByVal Wparam As Long, ByVal Lparam As Long) As Long
Dim MouseKeys As Long
Dim Rotation As Long
Dim Xpos As Long
Dim Ypos As Long
If Lmsg = WM_MOUSEWHEEL Then
MouseKeys = Wparam And 65535
Rotation = Wparam / 65536
Xpos = Lparam And 65535
Ypos = Lparam / 65536
MouseWheel MyForm.MSFlexGrid1, MouseKeys, Rotation, Xpos, Ypos
End If
WindowProc = CallWindowProc(LocalPrevWndProc, Lwnd, Lmsg, Wparam, Lparam)
End Function
Public Sub WheelHook(PassedForm As Form)
On Error Resume Next
Set MyForm = PassedForm
LocalHwnd = PassedForm.hWnd
LocalPrevWndProc = SetWindowLong(LocalHwnd, GWL_WNDPROC, AddressOf WindowProc)
End Sub
Public Sub WheelUnHook()
Dim WorkFlag As Long
On Error Resume Next
WorkFlag = SetWindowLong(LocalHwnd, GWL_WNDPROC, LocalPrevWndProc)
Set MyForm = Nothing
End Sub
Public Sub MouseWheel(ByVal MSF As MSFlexGrid, ByVal MouseKeys As Long, ByVal Rotation As Long, ByVal Xpos As Long, ByVal Ypos As Long)
Dim NewValue As Long
Dim Lstep As Single ‘滚动的行数
On Error Resume Next
With MSF
Lstep = 3
If Rotation > 0 Then
NewValue = .TopRow - Lstep
If NewValue < 1 Then
NewValue = 1
End If
Else
NewValue = .TopRow + Lstep
If NewValue > .Rows - 1 Then
NewValue = .Rows - 1
End If
End If
.TopRow = NewValue
End With
End Sub
‘------------------------------------------
‘Add MsFlexGrid1 to Form1 and code below
Private Sub Form_Activate()
Call WheelHook(Me)
End Sub
Private Sub Form_Deactivate()
Call WheelUnHook
End Sub
Private Sub Form_Load()
For i = 0 To 1100
MSFlexGrid1.AddItem i
‘ MSFlexGrid2.AddItem i
Next
End Sub
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