Question

I would like to get process id and process name via using window title
my develop environment is visual c++ 2008

how to do it.

thanks

Answer 1

HWND hw = FindWindow(NULL, L"Window Title");

if (hw)
{
    DWORD dwProcessId = 0;
    DWORD dwThreadId = GetWindowThreadProcessId(hw, &dwProcessId);

    HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, dwProcessId);

    if (hProcess)
    {
         wchar_t *szExeName[1024] = {0};
         if (QueryFullProcessImageName(hProcess, 0, szExeName, _countof(szExeName))
         {
            // ...
         }
         CloseHandle(hProcess);
    }
}

You should probably use the class argument as well (the one that is NULL in my first line) if you know it, so that it is less likely you will accidentally find some other program’s window that happens to have the same title.

Of course, the class name is not guaranteed to be unique between programs either, but the combination is more reliable than just using the title by itself.

You can get the window class easily using Spy++.

Edit: QueryFullProcessImageName requires Vista, but you can swap that line for one which uses GetProcessImageFileName as per DReJ’s answer.

Edit2: If you’re not compiling for unicode, remove the “L” before “Window Title” and use a char buffer instead of wchar_t.