Code:

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

* Procedure PostKeyEx

*

* Parameters:

*  hWindow: target window to be send the keystroke

*  key    : virtual keycode of the key to send. For printable

*           keys this is usually the ANSI code (Ord(character))

*           of the UPPERCASE character. See VkKeyScan to obtain

*           the virtual key codes of other characters.

*  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.

*Created: 02/21/96 16:39:00 by P. Below

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

Procedure PostKeyEx( hWindow: HWnd; key: Word; Const shift: TShiftState;

                    specialkey: Boolean );

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 }

Code:

procedure TForm1.SpeedButton2Click(Sender: TObject);

Var

W: HWnd;

begin

W := Memo1.Handle;

PostKeyEx( W, VK_END, [ssCtrl, ssShift], False ); {select all}

PostKeyEx( W, Ord('C'), [ssCtrl], False );        {copy to clipboard}

PostKeyEx( W, Ord('C'), [ssShift], False );       {replace with C}

PostKeyEx( W, VK_RETURN, [], False );             {new line}

PostKeyEx( W, VK_END, [], False );                {goto end}

PostKeyEx( W, Ord('V'), [ssCtrl], False );        {paste from keyboard}

end;