1. 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;
{************************************************************}
{2. With keybd_event API}
procedure TForm1.Button1Click(Sender: TObject);
begin {or you can also try this simple example to send any
amount of keystrokes at the same time. }
{Pressing the A Key and showing it in the Edit1.Text}
Edit1.SetFocus;
keybd_event(VK_SHIFT, 0, 0, 0);
keybd_event(Ord('A'), 0, 0, 0);
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP, 0);
{Presses the Left Window Key and starts the Run}
keybd_event(VK_LWIN, 0, 0, 0);
keybd_event(Ord('R'), 0, 0, 0);
keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, 0);
end;
{***********************************************************}
{3. 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;
{***********************************************************}
{3. With SendInput API}
// Example: Send text
procedure TForm1.Button1Click(Sender: TObject);
const Str:
string = 'writing writing writing';
var Inp: TInput;
I: Integer;
begin Edit1.SetFocus;
for I := 1
to Length(Str)
do begin // press
Inp.Itype := INPUT_KEYBOARD;
Inp.ki.wVk := Ord(UpCase(Str[i]));
Inp.ki.dwFlags := 0;
SendInput(1, Inp, SizeOf(Inp));
// release
Inp.Itype := INPUT_KEYBOARD;
Inp.ki.wVk := Ord(UpCase(Str[i]));
Inp.ki.dwFlags := KEYEVENTF_KEYUP;
SendInput(1, Inp, SizeOf(Inp));
Application.ProcessMessages;
Sleep(80);
end;
end;
// Example: Simulate Alt+Tab
procedure SendAltTab;
var KeyInputs:
array of TInput;
KeyInputCount: Integer;
procedure KeybdInput(VKey: Byte; Flags: DWORD);
begin Inc(KeyInputCount);
SetLength(KeyInputs, KeyInputCount);
KeyInputs[KeyInputCount - 1].Itype := INPUT_KEYBOARD;
with KeyInputs[KeyInputCount - 1].ki
do begin wVk := VKey;
wScan := MapVirtualKey(wVk, 0);
dwFlags := KEYEVENTF_EXTENDEDKEY;
dwFlags := Flags
or dwFlags;
time := 0;
dwExtraInfo := 0;
end;
end;
begin KeybdInput(VK_MENU, 0); // Alt
KeybdInput(VK_TAB, 0); // Tab
KeybdInput(VK_TAB, KEYEVENTF_KEYUP); // Tab
KeybdInput(VK_MENU, KEYEVENTF_KEYUP); // Alt
SendInput(KeyInputCount, KeyInputs[0], SizeOf(KeyInputs[0]));
end;
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