Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

{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;