一段代码，一个问题，谢谢(50分)

下面的代码可以屏蔽 win 键, 但是如何解除屏蔽 ? 试着改 CallNextHookEX 的参数不行，
请问该怎么做 ? 谢谢

function LowLevelKeyboardProc(nCode:integer;WParam:WPARAM;LParam:LPARAM):LRESULT;stdcall;
type
KBDLLHOOKSTRUCT=record
vkCodeWORD;
scanCodeWORD;
flagsWORD;
timeWord;
dwExtraInfo:dword;
end;
var
fFlag:BOOL;
p:^KBDLLHOOKSTRUCT;
begin
result:=0;
fFlag := false;
p:=Pointer(LPARAM);
if (ncode=HC_ACTION) then
begin
case wparam of
WM_KEYDOWN,
WM_SYSKEYDOWN,
WM_KEYUP,
WM_SYSKEYUP:
fFlag :=(p.vkCode = VK_Lwin) or (p.vkCode = VK_Rwin)or (p.vkCode = VK_apps);
end;
end;
if fFlag = true then
Result:=1;
if ncode <> 0 then
Result := CallNextHookEX(0,ncode,wparam,lparam);
end;


调用：

procedure TForm1.Button1Click(Sender: TObject);
const
WH_KEYBOARD_LL=13;
begin
setwindowshookexw(WH_KEYBOARD_LL,LowlevelKeyboardproc,hinstance,0);
end;

//fFlag :=(p.vkCode = VK_Lwin) or (p.vkCode = VK_Rwin)or (p.vkCode = VK_apps);
//if fFlag = true then
// Result:=0;
这些注释掉！

谢谢...

接受答案了.