谁能提供一个钩子示例程序?

Question

同上

Answer 1

unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
  function KeyboardHook(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LResult;STDCALL;
var
  Form1: TForm1;
  WinHook: HHOOK;
implementation{$R *.dfm}function KeyboardHook(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LResult;begin
  if (nCode>-1) then
  begin
    if wparam=VK_SHIFT then
      showmessage('your press the shift');
    result:=0;
  end
  else
    Result := CallNextHookEx(WinHook, nCode, wParam, lParam);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
   WinHook:=SetWindowsHookEx(WH_KEYBOARD, @KeyboardHook, 0, GetCurrentThreadID);
end;procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  UnhookWindowsHookEx(WinHook);
end;end.
键盘钩子