如何在拥有句柄时检查给定进程是否正在运行 [英] How to check if a given process is running when having its handle

问题描述

我正在使用 ShellExecuteEx 来启动一个应用程序.成功启动后，我读取 TShellExecuteInfo.hProcess 以获取已启动进程的句柄.

I am using ShellExecuteEx to start an application. After successful start im reading TShellExecuteInfo.hProcess to obtain a handle of the started process.

我想定期检查由我的应用程序启动的进程是否仍在运行.两个或多个同名进程可以同时运行，我想确保我的应用程序正在检查正确的进程.

I would like to periodically check if the process started by my application is still running. Two or more processess with the same name can run simultaneously and I want to be sure that my application is checking the correct process.

我希望能够在从 Windows 2000 到更高版本的 Windows 系统上执行此操作.

I want to be able to do this on Windows systems from Windows 2000 to above.

我知道有一个 WinAPI 函数 GetProcessId 正是我想要的，但它不支持 Windows 2000.

I know that there is WinAPI function GetProcessId which is doing exactly what I want but it does not support Windows 2000.

感谢您的回答.

推荐答案

致电 WaitForSingleObject 在该句柄上，并使用零超时参数.如果进程仍在运行，函数将返回Wait_Timeout；如果进程已经终止，那么它将返回 Wait_Object_0(因为进程终止会导致它的句柄变成 signaled.)

Call WaitForSingleObject on that handle, and use a timeout parameter of zero. If the process is still running, the function will return Wait_Timeout; if the process has terminated, then it will return Wait_Object_0 (because process termination causes its handles to become signaled.)

如果你想知道进程的退出状态是什么，那就调用GetExitCodeProcess.

If you want to know what the exit status of the process is, then call GetExitCodeProcess.

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