如何实现 printPreviewControl 的 鼠标滚轮 (MouseWheel) 事件

[hhq2000]

如何实现 printPreviewControl 的 鼠标滚轮 (MouseWheel) 事件

[zhouxian0518]

用委托

[hhq2000]

我使用如下代码：
this.printPreviewControl1.MouseWheel +=
new System.Windows.Forms.MouseEventHandler(this.printPreviewControl1_MouseWheel);
但没有代用这个方法

[benyouyong]

看下面这个你能不能用的着。
code


Private Const PM_REMOVE = &H1
Private Type POINTAPI
x As Long
y As Long
End Type
Private Type Msg
hWnd As Long
Message As Long
wParam As Long
lParam As Long
time As Long
pt As POINTAPI
End Type
Private Declare Function PeekMessage Lib "user32" Alias "PeekMessageA" (lpMsg As Msg丆 ByVal hWnd As Long丆 ByVal wMsgFilterMin As Long丆 ByVal wMsgFilterMax As Long丆 ByVal wRemoveMsg As Long) As Long
Private Declare Function WaitMessage Lib "user32" () As Long
Private bCancel As Boolean
Private Const WM_MOUSEWHEEL = 522

Private Sub ProcessMessages()
Dim Message As Msg
Do While Not bCancel
WaitMessage 'Wait For message and...
If PeekMessage(Message丆 Me.hWnd丆 WM_MOUSEWHEEL丆 WM_MOUSEWHEEL丆 PM_REMOVE) Then '...when the mousewheel is used...
If Message.wParam < 0 Then '...scroll up...
Me.Top = Me.Top + 240
Else '... or scroll down
Me.Top = Me.Top - 240
End If
End If
DoEvents
Loop
End Sub

Private Sub Form_Load()
Me.AutoRedraw = True
Me.Print "Please use now mouse wheel to move this form."
Me.Show
ProcessMessages
End Sub

Private Sub Form_Unload(Cancel As Integer)
bCancel = True
End Sub

[hhq2000]

benyouyong 有乱码，能再贴一下吗？

[benyouyong]

“丆”是贴导TXT的转换乱码。我也不知道哪来的。。去掉就可以了。

[hhq2000]

好的我试一下先

[hhq2000]

有c#代码吗，vb的看不懂。
我的msn:[e-mail]，发段完整的代码给我也行

[changjiangzhibin]

up