Sending Keystrokes/Text to a Window...

unit Unit1;

interface

uses

SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,

Forms, Dialogs, StdCtrls;

type

TForm1 = class(TForm)

Button1: TButton;

Button2: TButton;

procedure Button1Click(Sender: TObject);

procedure Button2Click(Sender: TObject);

procedure FormKeyPress(Sender: TObject; var Key: Char);

private

AppInst: THandle;

AppWind: THandle;

public

{ Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.DFM}

uses ShellAPI;

procedure SendShift(H: HWnd; Down: Boolean);

var vKey, ScanCode, wParam: Word;

lParam: longint;

begin

vKey:= $10;

ScanCode:= MapVirtualKey(vKey, 0);

wParam:= vKey or ScanCode shl 8;

lParam:= longint(ScanCode) shl 16 or 1;

if not(Down) then lParam:= lParam or $C0000000;

SendMessage(H, WM_KEYDOWN, vKey, lParam);

end;

procedure SendCtrl(H: HWnd; Down: Boolean);

var vKey, ScanCode, wParam: Word;

lParam: longint;

begin

vKey:= $11;

ScanCode:= MapVirtualKey(vKey, 0);

wParam:= vKey or ScanCode shl 8;

lParam:= longint(ScanCode) shl 16 or 1;

if not(Down) then lParam:= lParam or $C0000000;

SendMessage(H, WM_KEYDOWN, vKey, lParam);

end;

procedure SendKey(H: Hwnd; Key: char);

var vKey, ScanCode, wParam: Word;

lParam, ConvKey: longint;

Shift, Ctrl: boolean;

begin

ConvKey:= OemKeyScan(ord(Key));

Shift:= (ConvKey and $00020000) <> 0;

Ctrl:= (ConvKey and $00040000) <> 0;

ScanCode:= ConvKey and $000000FF or $FF00;

vKey:= ord(Key);

wParam:= vKey;

lParam:= longint(ScanCode) shl 16 or 1;

if Shift then SendShift(H, true);

if Ctrl then SendCtrl(H, true);

SendMessage(H, WM_KEYDOWN, vKey, lParam);

SendMessage(H, WM_CHAR, vKey, lParam);

lParam:= lParam or $C0000000;

SendMessage(H, WM_KEYUP, vKey, lParam);

if Shift then SendShift(H, false);

if Ctrl then SendCtrl(H, false);

end;

function EnumFunc(Handle: HWnd; TF: TForm1): Bool; Far;

begin

TF.AppWind:= 0;

if GetWindowWord(Handle, GWW_HINSTANCE) = TF.AppInst then

TF.AppWind:= Handle;

result:= (TF.AppWind = 0);

end;

procedure TForm1.Button1Click(Sender: TObject);

var Text: Array[0..255] of char;

begin

AppInst:= ShellExecute(Handle, 'open', 'notepad.exe', nil, '', SW_NORMAL);

EnumWindows(@EnumFunc, longint(self));

AppWind:= GetWindow(AppWind, GW_CHILD);

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

SendKey(AppWind, 'T');

SendKey(AppWind, 'e');

SendKey(AppWind, 's');

SendKey(AppWind, 't');

end;

procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);

begin

if AppWind <> 0 then SendKey(AppWind, Key);

end;

end.