Програмная эмуляция нажатия клавиш

Code:

{PostKeyEx32 function}

procedure PostKeyEx32(key: Word; const shift: TShiftState; specialkey: Boolean);

{************************************************************

* Procedure PostKeyEx32

*

* Parameters:

*  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.

* Description:

*  Uses keybd_event to manufacture a series of key events matching

*  the passed parameters. The events go to the control with focus.

*  Note that for characters key is always the upper-case version of

*  the character. Sending without any modifier keys will result in

*  a lower-case character, sending it with [ssShift] will result

*  in an upper-case character!

// Code by P. Below

************************************************************}

type

  TShiftKeyInfo = record

    shift: Byte;

    vkey: Byte;

  end;

  byteset = set of 0..7;

const

  shiftkeys: array [1..3] of TShiftKeyInfo =

    ((shift: Ord(ssCtrl); vkey: VK_CONTROL),

    (shift: Ord(ssShift); vkey: VK_SHIFT),

    (shift: Ord(ssAlt); vkey: VK_MENU));

var

  flag: DWORD;

  bShift: ByteSet absolute shift;

  i: Integer;

begin

  for i := 1 to 3 do

  begin

    if shiftkeys[i].shift in bShift then

      keybd_event(shiftkeys[i].vkey, MapVirtualKey(shiftkeys[i].vkey, 0), 0, 0);

  end; { For }

  if specialkey then

    flag := KEYEVENTF_EXTENDEDKEY

  else

    flag := 0;

  keybd_event(key, MapvirtualKey(key, 0), flag, 0);

  flag := flag or KEYEVENTF_KEYUP;

  keybd_event(key, MapvirtualKey(key, 0), flag, 0);

  for i := 3 downto 1 do

  begin

    if shiftkeys[i].shift in bShift then

      keybd_event(shiftkeys[i].vkey, MapVirtualKey(shiftkeys[i].vkey, 0),

        KEYEVENTF_KEYUP, 0);

  end; { For }

end; { PostKeyEx32 }

// Example:

procedure TForm1.Button1Click(Sender: TObject);

begin

  //Pressing the Left Windows Key

PostKeyEx32(VK_LWIN, [], False);

  //Pressing the letter D

PostKeyEx32(Ord('D'), [], False);

  //Pressing Ctrl-Alt-C

PostKeyEx32(Ord('C'), [ssctrl, ssAlt], False);

end;