c++ - CreateProcess 的第二个参数应该是什么？

Question

我正在尝试使用 CreateProcess() 启动服务器。这是代码:

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
    // TODO: Place code here.

    int result; 
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    CreateProcess("C:\\AP\\DatabaseBase\\dbntsrv.exe", "*** WHAT SHOULD I PUT HERE***", NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
    return 0;
}

我没有从文档中理解第二个参数应该是什么。你能帮我吗？谢谢你

Answer 1

来自 MSDN:

lpCommandLine [in, out, optional]

The command line to be executed. The maximum length of this string is 32,768 characters, including the Unicode terminating null character. If lpApplicationName is NULL, the module name portion of lpCommandLine is limited to MAX_PATH characters.

The Unicode version of this function, CreateProcessW, can modify the contents of this string. Therefore, this parameter cannot be a pointer to read-only memory (such as a const variable or a literal string). If this parameter is a constant string, the function may cause an access violation.

The lpCommandLine parameter can be NULL. In that case, the function uses the string pointed to by lpApplicationName as the command line.

所以 NULL 至少在那里是可以的。只要您不传递参数。