vb 禁止結(jié)束進(jìn)程本程序進(jìn)程

專門針對任務(wù)管理器。

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思路：將kernel32的TerminateProcess的首字節(jié)改為HC3，使TerminateProcess失效。

Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long

Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long

Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long

Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, lpBaseAddress As Any, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long

Private Declare Function CreateToolhelpSnapshot Lib "kernel32" Alias "CreateToolhelp32Snapshot" (ByVal lFlags As Long, ByVal lProcessID As Long) As Long

Private Declare Function ProcessFirst Lib "kernel32" Alias "Process32First" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long

Private Declare Function ProcessNext Lib "kernel32" Alias "Process32Next" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long '

Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long

Private Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleA" (ByVal lpModuleName As String) As Long

Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long

Private Const TH32CS_SNAPPROCESS = H2

Private Const TH32CS_SNAPheaplist = H1

Private Const TH32CS_SNAPthread = H4

Private Const TH32CS_SNAPmodule = H8

Private Const TH32CS_SNAPall = TH32CS_SNAPPROCESS + TH32CS_SNAPheaplist + TH32CS_SNAPthread + TH32CS_SNAPmodule

Private Const MAX_PATH As Integer = 260

Private Const PROCESS_ALL_ACCESS = H100000 + HF0000 + HFFF

Private Type PROCESSENTRY32

dwSize As Long

cntUseage As Long

th32ProcessID As Long

th32DefaultHeapID As Long

th32ModuleID As Long

cntThreads As Long

th32ParentProcessID As Long

pcPriClassBase As Long

swFlags As Long

szExeFile As String * 1024

End Type

Private Sub AntiKill()

On Error Resume Next

Dim MySnapHandle As Long

Dim hProcess As Long

Dim ProcessInfo As PROCESSENTRY32

Dim Addr As Long, hMod As Long

Dim ASM(0) As Byte

Dim sProcess As String

ASM(0) = HC3 'retn

hMod = GetModuleHandle("kernel32")

Addr = GetProcAddress(hMod, "TerminateProcess")

'Debug.Print Hex(Addr)

MySnapHandle = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0)

ProcessInfo.dwSize = Len(ProcessInfo)

If ProcessFirst(MySnapHandle, ProcessInfo) 0 Then

Do

sProcess = Left(LCase(ProcessInfo.szExeFile), InStr(ProcessInfo.szExeFile, ".") + 3)

If sProcess = "taskmgr.exe" Then

hProcess = OpenProcess(PROCESS_ALL_ACCESS, False, ProcessInfo.th32ProcessID)

'Debug.Print hProcess

WriteProcessMemory hProcess, ByVal Addr, ByVal VarPtr(ASM(0)), 1, 0

'Debug.Print Err.LastDllError

CloseHandle hProcess

End If

Loop While ProcessNext(MySnapHandle, ProcessInfo) 0

End If

CloseHandle MySnapHandle

Err.Clear

End Sub

vb.net2008攔截關(guān)機(jī)或注銷消息

在SystemEvents類中 可以 用戶試圖注銷或關(guān)閉系統(tǒng)時(shí)發(fā)生。 (當(dāng)用戶試圖注銷或關(guān)閉系統(tǒng)時(shí)發(fā)生。當(dāng)用戶試圖注銷或關(guān)閉系統(tǒng)時(shí)發(fā)生。) 這個(gè) 事件處理函數(shù)中 可以找到如下方法

Private Shared WM_QUERYENDSESSION As Integer = H11

Private Shared systemShutdown As Boolean = False

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)

If m.Msg = WM_QUERYENDSESSION Then

'MessageBox.Show("queryendsession: this is a logoff, shutdown, or reboot")

systemShutdown = True

End If

' If this is WM_QUERYENDSESSION, the closing event should be raised in the base WndProc.

MyBase.WndProc(m)

End Sub 'WndProc

Private Sub Form1_Closing(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing

If (systemShutdown) Then

' Reset the variable because the user might cancel the shutdown.

systemShutdown = False

If (System.Windows.Forms.DialogResult.Yes = _

MessageBox.Show("My application", "Do you want to save your work before logging off?", MessageBoxButtons.YesNo)) Then

e.Cancel = True

Else

e.Cancel = False

End If

End If

End Sub

vb.net中如何禁止從任務(wù)欄關(guān)閉window

綁定窗體的FormClosing事件，執(zhí)行e.Cancel = True即可。

如果你不想在任務(wù)欄上顯示窗體，把窗體的ShowOnTaskbar設(shè)為False。