WinKill() source code

Question

Can somebody share source code of WinKill() from AutoIt?

I want to know how it works with messages (yes/no/cancel) to be sure it's handled properly. I want to use it to clean desktop from unexpected pop-up windows.

Answer 1

As we can see below in the source code taken from the latest open source release of AutoIt (when it used to be open-source) and available here, the function sends WM_CLOSE message to the window. If the window doesn't get closed on 500ms, then it kills the process that created the window.

///////////////////////////////////////////////////////////////////////////////
// WinKill()
// Closes a window - uses more force than WinClose
///////////////////////////////////////////////////////////////////////////////

AUT_RESULT AutoIt_Script::F_WinKill(VectorVariant &vParams, Variant &vResult)
{
    Win_WindowSearchInit(vParams);

    if (Win_WindowSearch() == false)
        return AUT_OK;                          // Required window not found

    Util_WinKill(m_WindowSearchHWND);
    Util_Sleep(m_nWinWaitDelay);                // Briefly pause before continuing

    return AUT_OK;

} // WinKill()

///////////////////////////////////////////////////////////////////////////////
// Util_WinKill()
//
// Closes a window with extreme predjudice
//
///////////////////////////////////////////////////////////////////////////////

void Util_WinKill(HWND hWnd)
{
    DWORD      dwResult;

    LRESULT lResult = SendMessageTimeout(hWnd, WM_CLOSE, 0, 0, SMTO_ABORTIFHUNG, 500, &dwResult);   // wait 500ms

    if( !lResult )
    {
        // Use more force - Mwuahaha

        // Get the ProcessId for this window.
        DWORD   pid;
        GetWindowThreadProcessId( hWnd, &pid );

        // Open the process with all access.
        HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);

        // Terminate the process.
        TerminateProcess(hProcess, 0);

        CloseHandle(hProcess);
    }

} // Util_WinKill()