如何知道父进程的句柄并获取其子进程的句柄？

通过调用CreateProcess函数启动子进程时，可以在STARTUPINFO结构体中指定子进程的父进程句柄。此外，可以使用EnumProcesses函数遍历系统中的所有进程，根据父进程句柄获取其子进程句柄。

示例代码：

#include <windows.h> #include <stdio.h>

void main() { DWORD pid = GetCurrentProcessId(); HANDLE parentHandle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid); if (parentHandle == NULL) { printf("Error: Could not open current process handle.\n"); return; }

//start a child process and get its handle
PROCESS_INFORMATION pi;
STARTUPINFO si;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
si.dwFlags |= STARTF_USESTDHANDLES;

TCHAR commandLine[] = TEXT("notepad.exe");
BOOL created = CreateProcess(NULL, commandLine, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
if (!created)
{
    printf("Error: Could not create child process.\n");
    return;
}

DWORD childPid = pi.dwProcessId;
HANDLE childHandle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, childPid);
if (childHandle == NULL)
{
    printf("Error: Could not open child process handle.\n");
    return;
}

printf("Parent process handle: %p\n", parentHandle);
printf("Child process handle: %p\n", childHandle);

CloseHandle(parentHandle);
CloseHandle(childHandle);

}