Código: Seleccionar todo

library Project1;


uses
  Windows,
  Messages;

var
HookHandle: HHOOK;

function GetMsgProc (Code: integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
var
msg:tmsg;
begin
if Code = HC_ACTION then
begin
if TMsg (Pointer (LParam) ^).Message =wm_char then 
TMsg (Pointer (LParam) ^).wParam:= 0;      //
end;
Result:= CallNextHookEx (HookHandle, Code, wParam, DWORD (lParam));
end;

procedure StarHook ; export; stdcall;
begin

HookHandle:= SetWindowsHookEx (WH_GETMESSAGE, @GetMsgProc, HInstance, 0);
end ;



procedure unook;export; stdcall;
begin
UnhookWindowsHookEx(HookHandle);
HookHandle:= 0;
end;

exports
StarHook, unook;
begin
end.

Código: Seleccionar todo

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
    tarea: aca van las 2 llamadas a la dll
para iniciar y detener
    implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
starhook;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
unook;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
 unook;
end;

end.