用OpenProcess、GetExitCodeProcess和TerminateProcess关闭进程

最新推荐文章于 2025-03-11 23:30:55 发布

原创最新推荐文章于 2025-03-11 23:30:55 发布 · 1.2k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#python #操作系统 #shell

VB 专栏收录该内容

13 篇文章

订阅专栏

本文介绍了一个使用VB编写的shellCmd类，该类提供了用于检查进程是否正在运行和强制终止进程的功能。通过调用Windows API函数如OpenProcess和TerminateProcess，实现了对指定进程ID的进程进行操作。

如果需要结束其他进程的执行，可以使用TerminateProcess函数。

BOOL TermintaeProcess(HANDLE hProcess,UINT uExitCode );

hProcess是要结束的目标进程的句柄，uExitCode指定目标进程的退出代码，可以使用GetExitCodeProcess取得一个进程的退出代码。

对于一个已经存在的进程，只能使用OpenProcess函数来取得这个进程的访问权限。

HANDLE OpenProcess(DWORD dwDesiredAccess,BOOL bInheritHandle,DWORD dwProcessId );

dwDesiredAccess参数指定了对该进程的访问权限，这些权限可以是：PROCESS_ALL_ACCESS即所有可进行的权限；PROCESS_QUERY_INFORMATION即查看该进程信息的权限；还有很多。bInheritHandle参数指定此函数返回的句柄是否可以被继承。dwProcessId参数指定了要打开进程的ID号，可以从任务管理器中找到它们，也可以使用ToolHelp函数获取。

我用VB写的shellCmd类：

Option Explicit

Private Const PROCESS_ALL_ACCESS = &H1F0FFF
Private Const PROCESS_QUERY_INFORMATION = &H400

Private Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
Private Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function GetExitCodeProcess Lib "kernel32.dll" (ByVal hProcess As Long, lpExitCode As Long) As Long
Private Declare Function TerminateProcess Lib "kernel32.dll" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long

Public Function CloseProcess(ByVal dwProcessId As Long) As Boolean
    Dim hProcess As Long
    Dim lpExitCode As Long
    hProcess = OpenProcess(PROCESS_ALL_ACCESS, False, dwProcessId)
    If hProcess = 0 Then
        CloseProcess = False
        Exit Function
    End If
    If GetExitCodeProcess(hProcess, lpExitCode) = 0 Then
        CloseProcess = False
        CloseHandle (hProcess)
        Exit Function
    End If
    If TerminateProcess(hProcess, lpExitCode) = 0 Then
        CloseProcess = False
    Else
        CloseProcess = True
    End If
    CloseHandle (hProcess)
End Function

Public Function IsRunning(ByVal ProgramID) As Boolean
    Dim hProgram As Long
    hProgram = OpenProcess(PROCESS_QUERY_INFORMATION, False, ProgramID)
    If hProgram <> 0 Then
        IsRunning = True
    Else
        IsRunning = False
    End If
    CloseHandle hProgram
End Function

我用VB写的调用这个类的函数：

'shellCmd在ASP中调用CMD.EXE执行DOS下的EXE程序
'cmdStr为由CMD.exe及DOS下的EXE文件名路径名组成的字符串
'返回值为执行EXE所用的秒数
Public Function myShell(cmdStr) As Single
    Dim start, b, PID, ret, useTime, hProcess
    Set myshellclass = New shellCmd
    startTime = GetTickCount()
    useTime = 0
    PID = Shell(cmdStr, vbHide)     'vbNormalFocus显示窗口
    Do While myshellclass.IsRunning(PID) And useTime < 3000
        useTime = GetTickCount() - startTime
        DoEvents
    Loop
    Call myshellclass.CloseProcess(PID) '若该进程在运行则关闭它
    myShell = GetTickCount() - startTime
End Function