获取按键的有关问题

获取按键的问题
下面代码是获取按键勾的DLL代码：
#include   <vcl.h>
#include   <windows.h>
#pragma   hdrstop
#pragma   argsused

HHOOK   hOldHook=0;
HWND   hProcWnd=0;
HANDLE   hInstance=0;
extern   "C "   __declspec(dllexport)   void   _stdcall   SetHotKey(HWND   hWnd);

int   WINAPI   DllEntryPoint(HINSTANCE   hinst,   unsigned   long   reason,   void*   lpReserved)
{
        hInstance=hinst;
        return   1;
}
//-------------------------------------

LRESULT   CALLBACK   KeyboardProc(int   nCode,WPARAM   wParam,LPARAM   lParam)
{
WPARAM   wP=wParam;
if(nCode> =0)
{
        AnsiString   msg= " ";
        if(wP> = 'A '   &&   wP <= 'D ')
                msg= "press   key:between   a   and   d ";
        else   if(wParam==91)                       //91:left   start   menu
                msg= "press   key:left   start   memu ";
        if(msg!= " ")
        {//已实现：当按下A-D，左菜单键时：弹出一个对话框，可如何屏蔽这些键压下引起的其它事件呢？也就是当作没压下键一样。
                //wP=0X00000000;//不起作用
                MessageBox(NULL,msg.c_str(), "keyboard ",MB_OK);
        }
}
return   CallNextHookEx(hOldHook,nCode,wP,lParam);
}
//---------

void   _stdcall   SetHotKey(HWND   hWnd)
{
hProcWnd=hWnd;
hOldHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hInstance,0);
}

[解决办法]
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