如何才能支持按键按上去后不放，连续播放图片

怎么才能支持按键按下去后不放，连续播放图片？
我做了一个实现简单的动画功能，但是只支持按下后放开，按这不放的时候要停顿5秒左右才能连续播放动画；怎么实现按下后不要停顿能连续播放？

/*回调函数*/
static void draw_boy(timer * pMe)
{
IDISPLAY_ClearScreen(pMe->a.m_pIDisplay);
	switch(pMe->wParam) {
		
	case AVK_UP:
		IIMAGE_SetParm(pMe->LPBoy_up_down,IPARM_OFFSET,0,(pMe->pi.cy/14)*(13 - (pMe->boy_infor.boy_up) ));
		IIMAGE_SetDrawSize(pMe->LPBoy_up_down,22,pMe->pi.cy/14);
		IIMAGE_Draw(pMe->LPBoy_up_down,pMe->boy_infor.x,pMe->boy_infor.y);
		//IBASE_Release((IBase *)pMe->LPBoy);
		break;	
case AVK_DOWN:
		IIMAGE_SetParm(pMe->LPBoy_up_down,IPARM_OFFSET,0,(pMe->pi.cy/14)*(6 - (pMe->boy_infor.boy_down) ));
		IIMAGE_SetDrawSize(pMe->LPBoy_up_down,22,pMe->pi.cy/14);
		IIMAGE_Draw(pMe->LPBoy_up_down,pMe->boy_infor.x,pMe->boy_infor.y);
		//IBASE_Release((IBase *)pMe->LPBoy);
		break;
default:
		return ;}
IDISPLAY_Update(pMe->a.m_pIDisplay);}
static boolean timer_HandleEvent(timer* pMe, AEEEvent eCode, uint16 wParam, uint32 dwParam)
{ 
 switch (eCode) 
	{
case EVT_KEY:
switch(wParam) 
			{ 
			case AVK_UP:
				pMe->boy_infor.y -=3;
				pMe->boy_infor.boy_up++;
				pMe->boy_infor.boy_up = pMe->boy_infor.boy_up%3;
				
				if (SUCCESS != ISHELL_SetTimer(pMe->a.m_pIShell,100,(PFNNOTIFY)draw_boy,pMe))
				{
					return FALSE;
				}	
				break;
case AVK_DOWN:
				pMe->boy_infor.y +=3;
				pMe->boy_infor.boy_down++;
				pMe->boy_infor.boy_down = pMe->boy_infor.boy_down%3;
				
				if (SUCCESS != ISHELL_SetTimer(pMe->a.m_pIShell,100,(PFNNOTIFY)draw_boy,pMe))
				{
					return FALSE;
				}	
				break;

			default:
				return FALSE;
			}
      		return(TRUE);
default:
            break;
   }
 return FALSE;
｝

只上传了上、下键的代码，左、右键代码基本一样，帮看下怎么实现按下不放的连续播放？
------解决方案--------------------------------------------------------
draw_boy()中再起定时器来播放动画，检测按键抬起的事件去消除draw_boy()中启动的定时器。