全局钩子锁定键盘

全局钩子锁定键盘

时间:2011-5-26来源:yang 作者: peng点击: 219次

全局钩子锁定键盘(Delphi)//可以锁所有键盘按键和任意组合键,但对于ALT+TAB,CTRL+ALT+DEL无效!

//DLL代码如下

Library KillKB;

uses Wintypes, WinProcs;

Var
    oldHook: HHook;

function KBHooKProc(code: Integer; wParam: WPARAM;lParam: LPARAM):LRESULT;stdcall; export;
Begin
If code < 0 Then
   Result := CallNextHookEx( oldHook, code, wparam, lparam )
Else
   Result := 1;
end;

function DisableKeyboard: Boolean; export;
Begin
    oldHook := SetWindowsHookEx(WH_KEYBOARD,KBHooKProc,HInstance, 0 );
    DisableKeyboard := oldHook <> 0;
End;

procedure EnableKeyboard; export;
Begin
If oldHook <> 0 Then Begin
    UnhookWindowshookEx( oldHook );
    oldHook := 0;
End;
End;

exports
    DisableKeyboard,
    EnableKeyboard;

Begin
    oldHook := 0;
End.