关于键盘钩子的问题，请教大家

function     StartHookMouse:boolean;  
  const  
      WH_MOUSE_LL   =   14;  
  begin  
    if   hhkLowLevelMouse   =   0   then   hhkLowLevelMouse   :=   SetWindowsHookEx(WH_MOUSE_LL,   LowlevelMouseProc,   HInstance,   0);  
    //if   hhkLowLevelMouse   =   0   then   hhkLowLevelMouse   :=   SetWindowsHook(WH_MOUSE_LL,   @LowlevelMouseProc);  
    result   :=   (hhkLowLevelMouse   <>   0)   ;  
  end;  
   
  这段放在自己的程序里面，没有放在dll里面，在xp里面可以做到全局钩子，但是在  
  98中钩子无效，何解？？？？  
  请问高手

kernel32.dll?

function     StartHookMouse:boolean;  
  begin  
    if   hhkLowLevelMouse   =   0   then   hhkLowLevelMouse   :=   SetWindowsHookEx(WH_MOUSE_LL,   LowlevelMouseProc,   HInstance,   0);  
    result   :=   (hhkLowLevelMouse   <>   0)   ;  
  end;

const  
      WH_KEYBOARD_LL   =   13;    
      WH_MOUSE_LL   =   14;

98中钩子无效！