如何向窗口发送击键？

Question

即时通讯使用keybd_event(); 我想使用SendMessage(); 将按键发送到记事本,可以这样做吗？

Answer 1

使用SendMessage插入文字编辑缓冲区(这听起来像你想要的):

HWND notepad = FindWindow(_T("Notepad"), NULL);
HWND edit = FindWindowEx(notepad, NULL, _T("Edit"), NULL);
SendMessage(edit, WM_SETTEXT, NULL, (LPARAM)_T("hello"));

如果您需要密钥代码和任意键击,您可以使用SendInput()(在2k/xp和首选中可用)或keybd_event()`(最终将在新操作系统中调用SendInput)这里的一些示例:

http://www.codeguru.com/forum/showthread.php?t=377393

还有您可能感兴趣的SendMessage的WM_SYSCOMMAND/WM_KEYDOWN/WM_KEYUP/WM_CHAR事件.

Answer 2

keybd_event()已被SendInput()取代,因此最好使用它.以下是一些示例代码,可以执行您所要求的操作.您可以使用SendMessage()直接编辑记事本窗口的编辑控件,也可以使用SendInput()来合成要发送到窗口的击键.

使用SendInput():

int SendKeystrokesToNotepad( const TCHAR *const text )
{
    INPUT *keystroke;
    UINT i, character_count, keystrokes_to_send, keystrokes_sent;
    HWND notepad;

    assert( text != NULL );

    //Get the handle of the Notepad window.
    notepad = FindWindow( _T( "Notepad" ), NULL );
    if( notepad == NULL )
        return 0;

    //Bring the Notepad window to the front.
    if( !SetForegroundWindow( notepad ) )
        return 0;

    //Fill in the array of keystrokes to send.
    character_count = _tcslen( text );
    keystrokes_to_send = character_count * 2;
    keystroke = new INPUT[ keystrokes_to_send ];
    for( i = 0; i < character_count; ++i )
    {
        keystroke[ i * 2 ].type = INPUT_KEYBOARD;
        keystroke[ i * 2 ].ki.wVk = 0;
        keystroke[ i * 2 ].ki.wScan = text[ i ];
        keystroke[ i * 2 ].ki.dwFlags = KEYEVENTF_UNICODE;
        keystroke[ i * 2 ].ki.time = 0;
        keystroke[ i * 2 ].ki.dwExtraInfo = GetMessageExtraInfo();

        keystroke[ i * 2 + 1 ].type = INPUT_KEYBOARD;
        keystroke[ i * 2 + 1 ].ki.wVk = 0;
        keystroke[ i * 2 + 1 ].ki.wScan = text[ i ];
        keystroke[ i * 2 + 1 ].ki.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
        keystroke[ i * 2 + 1 ].ki.time = 0;
        keystroke[ i * 2 + 1 ].ki.dwExtraInfo = GetMessageExtraInfo();
    }

    //Send the keystrokes.
    keystrokes_sent = SendInput( ( UINT )keystrokes_to_send, keystroke, sizeof( *keystroke ) );
    delete [] keystroke;

    return keystrokes_sent == keystrokes_to_send;
}

使用SendMessage():

int SendKeystrokesToNotepad( const TCHAR *const text )
{
    HWND notepad, edit;

    assert( text != NULL );

    //Get the handle of the Notepad window.
    notepad = FindWindow( _T( "Notepad" ), NULL );
    if( notepad == NULL )
        return 0;

    //Get the handle of the Notepad window's edit control.
    edit = FindWindowEx( notepad, NULL, _T( "Edit" ), NULL );
    if( edit == NULL )
        return 0;

    SendMessage( edit, EM_REPLACESEL, ( WPARAM )TRUE, ( LPARAM )text );
    return 1;
}

我希望有所帮助.