Detecting if a process is still running

Question

I need to check if a process with a given HANDLE is still running, I tried to do it using the following code however it always returns at the second return false, even if the process is running.

bool isProcessRunning(HANDLE process)
{
    if(process == INVALID_HANDLE_VALUE)return false;

    DWORD exitCode;
    if(GetExitCodeProcess(process, &exitCode) != 0)
        return false;//always returns here

    return GetLastError() == STILL_ACTIVE;//still running
}

Answer 1

You can test the process life by using

bool isProcessRunning(HANDLE process)
{
   return WaitForSingleObject( process, 0 ) == WAIT_TIMEOUT;
}