如何等待CreateProcess()创建的进程结束？

[clfk]

用CreateProcess()创建进程，怎么才能知道创建完成了？

[masterz]

PROCESS_INFORMATION pi;
STARTUPINFO si;
si.cb = sizeof(STARTUPINFO);
si.lpReserved = NULL;
si.lpDesktop = NULL;
si.lpTitle = NULL;
si.dwFlags = 0;
si.cbReserved2 = 0;
si.lpReserved2 = NULL;
BOOL bres = CreateProcess(NULL,"test a.txt b.txt",NULL,NULL,false,
NORMAL_PRIORITY_CLASS,
NULL,NULL,&si,&pi);
if(bres==false)
{
AfxMessageBox("CreateProcess failed");
}
else
{
CloseHandle(pi.hThread);
DWORD dwret=WaitForSingleObject(pi.hProcess, 1000*30);
switch(dwret)
{
case WAIT_OBJECT_0:
DWORD dwexitcode;
bres = GetExitCodeProcess(pi.hProcess,&dwexitcode);
TCHAR exitmsgbuf[1024];
if(bres)
{
wsprintf(exitmsgbuf,"exit code:%d",dwexitcode);
}
else
wsprintf(exitmsgbuf,"exit code failed to return");

AfxMessageBox(exitmsgbuf);
break;
default:
AfxMessageBox("exit for other reason");
}
CloseHandle(pi.hProcess);
}

[pcman1990]

CreateProcess()说明如下：
BOOL CreateProcess(
LPCTSTR lpApplicationName,
// pointer to name of executable module
LPTSTR lpCommandLine, // pointer to command line string
LPSECURITY_ATTRIBUTES lpProcessAttributes, // process security attributes
LPSECURITY_ATTRIBUTES lpThreadAttributes, // thread security attributes
BOOL bInheritHandles, // handle inheritance flag
DWORD dwCreationFlags, // creation flags
LPVOID lpEnvironment, // pointer to new environment block
LPCTSTR lpCurrentDirectory, // pointer to current directory name
LPSTARTUPINFO lpStartupInfo, // pointer to STARTUPINFO
LPPROCESS_INFORMATION lpProcessInformation // pointer to PROCESS_INFORMATION
);

其中最后一个参数是指向PROCESS_INFORMATION结构的指针，PROCESS_INFORMATION结构如下：
typedef struct _PROCESS_INFORMATION {
HANDLE hProcess;
HANDLE hThread;
DWORD dwProcessId;
DWORD dwThreadId;
} PROCESS_INFORMATION;

这个参数保存了CreateProcess()创建进程的一些信息，如进程的句柄等，可以用WaitForSingleObject()等待这个进程句柄发生变化来判断CreateProcess()是否完成。

示例代码如下：

STARTUPINFO si;
PROCESS_INFORMATION pi;

ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
ZeroMemory(&pi, sizeof(pi));

if(!CreateProcess(NULL,"MyChildProcess", NULL, NULL, FALSE,
0, NULL, NULL, &si, &pi))
{
return;
}

WaitForSingleObject(pi.hProcess, INFINITE);

CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);

[clfk]

谢了！