nbk联轴器mhs (nbk联轴器官网)nbk联轴器mhs (nbk联轴器官网

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NBK联轴器质量好不好?

像米思米、NBK这类日本品牌的联轴器,质量还是可以的,但是你知道的进口的东西价格都相对比较贵,可以考虑用一些知名国产品牌替代。

有谁能帮助解答"西北工业大学网络教育学院2009年5月考试试题"

3.有一IP地址为192.207.150.130的主机,其所在网络的缺省子网掩码是255.255.255.0

6.HDLC帧的类型有三种,它们分别是信息帧、控制帧和无编号帧。

7.IP分组格式中,数据报头部长度的最小值为__20_________个字节,最大值为60个字节。

9.现在经常使用的IP协议版本号为4,其IP地址为____32_______位。

10.曼彻斯特编码技术的编码效率是_____50______%,而4B/5B编码的效率是____80_______%。

报文处理系统(MHS)由__________,__________,__________和__________等几部分组成。

• MHS 的功能模型包含了报文自理系统的主要功能元素。报文传输系统 MTS ( Message Transfer System )由一些互连的报文传输代理 MTA ( Message Transfer Agent )组成。 MTA 接受用户代理 UA(User Agent) 提交的报文,把它传送给目的端 MTA 。报文在网络中经过多次存储—转发,最后由目的端的 MTA 投递给 UA 或者被存放在目的端的报文 MS ( Message Store )。在一般情况下, UA 置于用户个人计算机终端上, MTA 置于通讯公司的大型机器上。

• MHS 服务分成四类:报文传输服务、个人间报文通信服务、报文存储服务和物理投递服务。

我想用VB做了个简单的网页浏览器,不想让别人复制网页地址,想屏蔽VB中网页窗口的右键~怎么弄

你用的是什么控件啊,WebBrowser倒是可以用下面的方法。

在含有WebBrowser控件的窗体中,添加如下的代码:

Private Sub Form_Load()

SetHook

End Sub

Private Sub Form_Unload(Cancel As Integer)

DelHook

End Sub

然后再新建一个模块,加入下列代码:

Option Explicit

Private Declare Function SetWindowsHookEx Lib "user32" _

Alias "SetWindowsHookExA" ( _

ByVal idHook As Long, _

ByVal lpfn As Long, _

ByVal hmod As Long, _

ByVal dwThreadId As Long _

) As Long

Private Declare Function UnhookWindowsHookEx Lib "user32" ( _

ByVal hHook As Long _

) As Long

Private Declare Function CallNextHookEx Lib "user32" ( _

ByVal hHook As Long, _

ByVal nCode As Long, _

ByVal wParam As Long, _

lParam As Any _

) As Long

Private Declare Sub CopyMemory Lib "kernel32" _

Alias "RtlMoveMemory" ( _

ByRef Destination As Any, _

ByRef Source As Any, _

ByVal Length As Long _

)

Private Declare Function GetClassName Lib "user32" _

Alias "GetClassNameA" ( _

ByVal hWnd As Long, _

ByVal lpClassName As String, _

ByVal nMaxCount As Long _

) As Long

Private Type POINTAPI

x As Long

y As Long

End Type

Private Type MHS

pt As POINTAPI

hWnd As Long

wHitTestCode As Long

dwExtraInfo As Long

End Type

Private Const WH_MOUSE As Long = 7

Private Const WM_RBUTTONDOWN As Long = H204

Private Const WM_RBUTTONUP As Long = H205

Private hHook As Long

Private Function GetClassNameStr(ByVal hWnd As Long) As String

Dim TempStr As String, Rc As Long

Const NAME_MAX_LEN = 256

TempStr = Space(NAME_MAX_LEN)

Rc = GetClassName(hWnd, TempStr, NAME_MAX_LEN)

GetClassNameStr = StrConv(LeftB$(StrConv( _

TempStr, vbFromUnicode), Rc), vbUnicode)

End Function

Private Function HookProc( _

ByVal nCode As Long, _

ByVal wParam As Long, _

ByVal lParam As Long _

) As Long

Static MH As MHS

CopyMemory MH, ByVal lParam, LenB(MH)

HookProc = CallNextHookEx( _

hHook, nCode, wParam, lParam)

If wParam = WM_RBUTTONDOWN Or _

wParam = WM_RBUTTONUP Then

If LCase(GetClassNameStr(MH.hWnd)) = _

LCase("Internet Explorer_Server") Then

HookProc = 1

End If

End If

End Function

Public Function SetHook() As Boolean

If hHook = 0 Then _

hHook = SetWindowsHookEx( _

WH_MOUSE, AddressOf HookProc, _

App.hInstance, App.ThreadID)

SetHook = CBool(hHook)

End Function

Public Function DelHook() As Boolean

If UnhookWindowsHookEx(hHook) = 0 Then

DelHook = False

Else

hHook = 0

DelHook = True

End If

End Function

就可以了。

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