关于按钮的问题！

Question

//如果正在游戏当中;
if( pGame->m_bOperate  )
{
pGame->m_cCardsRect.right    = Center_x0 + Card_Distance1 * (pCenterCards->m_nCardsCounter - 1) + Cards_Width;
pGame->m_cCardsUpRect.right = Center_x0 + Card_Distance1 * (pCenterCards->m_nCardsCounter - 1) + Cards_Width;
if( pInput->IsLButtonDown(pGame->m_cCardsRect) )
{
::GetCursorPos(&point);
pos = (point.x - Center_x0)/Card_Distance1 + 1;  //左键点击的牌; if(pos >= pCenterCards->m_nCardsCounter)
{
if(pCardsMap->Center0[pCenterCards->m_nCardsCounter - 1].m_nY != Center_y0 - Card_Up)
{
PlaySound(MAKEINTRESOURCE(IDR_GIVE),AfxGetResourceHandle(),
SND_ASYNC|SND_RESOURCE|SND_NODEFAULT );  //
pCardsMap->Center0[pCenterCards->m_nCardsCounter - 1].m_nY -= Card_Up;
pCardsMap->m_nUpCounter++; //选择提起的牌数加一;
::RedrawGame();
// return 1;
}//end if(pCardsMap->Center0[pCenterCards->Cards_Counter - 1].m_nY == Center_y0 - Card_Up)
}
else
{
if(pCardsMap->Center0[pos - 1].m_nY != Center_y0 - Card_Up)
{
PlaySound(MAKEINTRESOURCE(IDR_GIVE),AfxGetResourceHandle(),
SND_ASYNC|SND_RESOURCE|SND_NODEFAULT );  //
pCardsMap->Center0[pos - 1].m_nY -= Card_Up;
pCardsMap->m_nUpCounter++; //选择提起的牌数加一;
::RedrawGame();
// return 1;
}
}// end if(pos >= pCenterCards->Cards_Counter)
}
else if( pInput->IsRButtonDown(pGame->m_cCardsUpRect) )
{
::GetCursorPos(&point);
pos = (point.x - Center_x0)/Card_Distance1 + 1;  //右键点击的牌; if(pos >= pCenterCards->m_nCardsCounter)
{
if(pCardsMap->Center0[pCenterCards->m_nCardsCounter - 1].m_nY == Center_y0 - Card_Up)
{
PlaySound(MAKEINTRESOURCE(IDR_GIVE),AfxGetResourceHandle(),
SND_ASYNC|SND_RESOURCE|SND_NODEFAULT );  //
pCardsMap->Center0[pCenterCards->m_nCardsCounter - 1].m_nY += Card_Up;
pCardsMap->m_nUpCounter--; //选择提起的牌数减一;
::RedrawGame();
}
}
    else
{
if(pCardsMap->Center0[pos - 1].m_nY == Center_y0 - Card_Up)
{
PlaySound(MAKEINTRESOURCE(IDR_GIVE),AfxGetResourceHandle(),
SND_ASYNC|SND_RESOURCE|SND_NODEFAULT );  //
pCardsMap->Center0[pos - 1].m_nY += Card_Up;
pCardsMap->m_nUpCounter--; //选择提起的牌数减一;
::RedrawGame();
}
}// end if(pos >= pCenterCards->Cards_Counter)
}//end if 点击在未出牌区;　如果我想改为单击牌的时候上去，再点击牌的时候牌下来！应该怎么改呢？
请各位大虾指教！！