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unit mklu;

interface

uses
  Windows;

var
  m_OldMHook: HHook = 0;
  k_OldKBHook: HHook = 0;

function KbHook(code: Integer; wparam: Word; lparam: LongInt): LongInt; stdcall;
procedure KeyBoardOn;
procedure KeyBoardOff;
function MouseHook(code: Integer; wparam: Word; lparam: LongInt): LongInt;
  stdcall;
procedure MOUSEON;
procedure MouseOff;

implementation

function KbHook(code: Integer; wparam: Word; lparam: LongInt): LongInt; stdcall;
begin
  if code < 0 then
    Result := CallNextHookEx(k_oldKbHook, code, wparam, lparam)
  else
    Result := 1;
end;

// включение клавы

procedure KeyBoardOn;
begin
  if k_OldKbHook <> 0 then
  begin
    UnHookWindowshookEx(k_OldKbHook);
    k_OldKbHook := 0;
  end;
end;

// выключение клавы

procedure KeyBoardOff;
begin
  k_OldKbHook := SetWindowsHookEx(WH_KEYBOARD, @KbHook, HInstance, 0);
end;

function MouseHook(code: Integer; wparam: Word; lparam: LongInt): LongInt;
  stdcall;
begin
  if code < 0 then
    Result := CallNextHookEx(m_oldMHook, code, wparam, lparam)
  else
    Result := 1;
end;

// включение мышки

procedure MOUSEON;
begin
  if m_OldMHook <> 0 then
  begin
    UnHookWindowshookEx(m_OldMHook);
    m_OldMHook := 0;
  end;
end;

// выключение мышки

procedure MouseOff;
begin
  m_OldMHook := SetWindowsHookEx(WH_MOUSE, @MOUSEHook, HInstance, 0);
end;

end.

Пример использования:

uses mklu;

{блокировка(LockIt = true) или разблокировка(LockIt= False) клавы}

procedure LockUnlockKeyboard(LockIt: Boolean);
begin
  if LockIt then
    KeyBoardOFF
  else
    KeyBoardOn;
end;

{блокировка(LockIt = true) или разблокировка(LockIt= False) мышки}

procedure LockUnlockMouse(LockIt: Boolean);
begin
  if LockIt then
    MouseOff
  else
    MouseOn;
end;

library DisableKB;

uses
  Forms,
  Windows,
  Messages,
  HookCommon in 'HookCommon.pas';

{$J+}
const
  Hook: HHook = 0;
  WH_KEYBOARD_LL = 13;
{$J-}

{$R *.res}

function HookProc(nCode: Integer; MsgID: WParam; Data: LParam): LResult; stdcall;
begin
    Result := -1;
end;

procedure DisableKB; stdcall;
begin
  if Hook = 0 then Hook:=SetWindowsHookEx(WH_KEYBOARD_LL,@HookProc,HInstance,0);
end;

procedure EnableKB; stdcall;
begin
  UnhookWindowsHookEx(Hook);
  Hook:=0;
end;

exports
  DisableKB, EnableKB;

begin
end.



unit HookCommon;

interface

uses Windows;

procedure DisableKB; stdcall;
procedure EnableKB; stdcall;

implementation

procedure DisableKB; stdcall; external 'disablekb.DLL';
procedure EnableKB; stdcall; stdcall; external 'disablekb.DLL';

initialization
end.