这段代码有什么问题？(30分)

我正在学HOOK，在网上抄了这样一段代码，但发现竟然有错误，代码如下，我发现：只要把GetKeyState(VK_CONTROL)&lt;0<br>这一句去掉就没错误了，不知是何原因，错误信息：<br>[Error] keyhook1.dpr(25): Operator not applicable to this operand type<br>=============================================================================<br>function HookProc(ncode,wparam,lparam:Integer):Integer;stdcall;<br>var<br> &nbsp;winhandle:HWND;<br>begin<br> &nbsp;if ((wParam=VK_F12) and GetKeyState(VK_CONTROL)&lt;0) then<br> &nbsp;begin<br> &nbsp; &nbsp;winhandle:=GetForegroundWindow;<br> &nbsp; &nbsp;ShowMessage('ok');<br> &nbsp;end;<br> &nbsp;Result:=CallNextHookEx(oldhook,nCode,wParam,lParam);<br>end;

if ((wParam=VK_F12) and GetKeyState(VK_CONTROL)&lt;0) then<br>改为<br>if ((wParam=VK_F12) and (GetKeyState(VK_CONTROL)&lt;0)) then

已经知道了，原来GetKeyState(VK_CONTROL)&lt;0忘记用括号括起来了

接受答案了.