Симулируем нажатие клавиш на клавиатуре 3Delphi , ОС и Железо , КлавишиСимулируем нажатие клавиш на клавиатуре 3
Оформил: DeeCo {With keybd_event API} procedure PostKeyExHWND(hWindow: HWnd; key: Word; const shift: TShiftState; specialkey: Boolean); {************************************************************ * Procedure PostKeyEx * * Parameters: * hWindow: target window to be send the keystroke * key : virtual keycode of the key to send. For printable * keys this is simply the ANSI code (Ord(character)). * shift : state of the modifier keys. This is a set, so you * can set several of these keys (shift, control, alt, * mouse buttons) in tandem. The TShiftState type is * declared in the Classes Unit. * specialkey: normally this should be False. Set it to True to * specify a key on the numeric keypad, for example. * If this parameter is true, bit 24 of the lparam for * the posted WM_KEY* messages will be set. * Description: * This procedure sets up Windows key state array to correctly * reflect the requested pattern of modifier keys and then posts * a WM_KEYDOWN/WM_KEYUP message pair to the target window. Then * Application.ProcessMessages is called to process the messages * before the keyboard state is restored. * Error Conditions: * May fail due to lack of memory for the two key state buffers. * Will raise an exception in this case. * NOTE: * Setting the keyboard state will not work across applications * running in different memory spaces on Win32 unless AttachThreadInput * is used to connect to the target thread first. *Created: 02/21/96 16:39:00 by P. Below ************************************************************} type TBuffers = array [0..1] of TKeyboardState; var pKeyBuffers: ^TBuffers; lParam: LongInt; begin (* check if the target window exists *) if IsWindow(hWindow) then begin (* set local variables to default values *) pKeyBuffers := nil; lParam := MakeLong(0, MapVirtualKey(key, 0)); (* modify lparam if special key requested *) if specialkey then lParam := lParam or $1000000; (* allocate space for the key state buffers *) New(pKeyBuffers); try (* Fill buffer 1 with current state so we can later restore it. Null out buffer 0 to get a "no key pressed" state. *) GetKeyboardState(pKeyBuffers^[1]); FillChar(pKeyBuffers^[0], SizeOf(TKeyboardState), 0); (* set the requested modifier keys to "down" state in the buffer*) if ssShift in shift then pKeyBuffers^[0][VK_SHIFT] := $80; if ssAlt in shift then begin (* Alt needs special treatment since a bit in lparam needs also be set *) pKeyBuffers^[0][VK_MENU] := $80; lParam := lParam or $20000000; end; if ssCtrl in shift then pKeyBuffers^[0][VK_CONTROL] := $80; if ssLeft in shift then pKeyBuffers^[0][VK_LBUTTON] := $80; if ssRight in shift then pKeyBuffers^[0][VK_RBUTTON] := $80; if ssMiddle in shift then pKeyBuffers^[0][VK_MBUTTON] := $80; (* make out new key state array the active key state map *) SetKeyboardState(pKeyBuffers^[0]); (* post the key messages *) if ssAlt in Shift then begin PostMessage(hWindow, WM_SYSKEYDOWN, key, lParam); PostMessage(hWindow, WM_SYSKEYUP, key, lParam or $C0000000); end else begin PostMessage(hWindow, WM_KEYDOWN, key, lParam); PostMessage(hWindow, WM_KEYUP, key, lParam or $C0000000); end; (* process the messages *) Application.ProcessMessages; (* restore the old key state map *) SetKeyboardState(pKeyBuffers^[1]); finally (* free the memory for the key state buffers *) if pKeyBuffers <> nil then Dispose(pKeyBuffers); end; { If } end; end; { PostKeyEx } // Example: procedure TForm1.Button1Click(Sender: TObject); var targetWnd: HWND; begin targetWnd := FindWindow('notepad', nil) if targetWnd <> 0 then begin PostKeyExHWND(targetWnd, Ord('I'), [ssAlt], False); end; end; Статья Симулируем нажатие клавиш на клавиатуре 3 раздела ОС и Железо Клавиши может быть полезна для разработчиков на Delphi и FreePascal. Комментарии и вопросыМатериалы статей собраны из открытых источников, владелец сайта не претендует на авторство. Там где авторство установить не удалось, материал подаётся без имени автора. В случае если Вы считаете, что Ваши права нарушены, пожалуйста, свяжитесь с владельцем сайта.
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