A fast and lightweight cell control

// MyCell - version 1.0
// Written by Yanxueming <yanxm2003@hotmail.com>
// Copyright (C) 2006-2006
// All rights reserved.
//
// The code and information is provided "as-is" without
// warranty of any kind, either expressed or implied.
#pragma once

#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL                   0x020A
#endif

namespace mycell{
	class Grid;
	class ScrollImp
	{
		Grid* pGrid_;
	public:		  
		ScrollImp(Grid* p):pGrid_(p)
		{}
		BEGIN_MSG_MAP(ScrollImp)
			MESSAGE_HANDLER(WM_VSCROLL,OnVScroll)
			MESSAGE_HANDLER(WM_HSCROLL,OnHScroll)
			MESSAGE_HANDLER(WM_MOUSEWHEEL, OnMouseWheel)
		END_MSG_MAP()

	public:
		//void ResetScrollBars(BOOL bResetHCrollBar,BOOL bResetVScrollBar);
		//int GetScrollPos32(HWND hWnd,int nBar, BOOL bGetTrackPos  = FALSE )
		//{
		//	SCROLLINFO si;
		//	si.cbSize = sizeof(SCROLLINFO);
		//	if (bGetTrackPos){
		//		si.fMask = SIF_TRACKPOS;
		//		if (::GetScrollInfo(hWnd,nBar, &si))
		//			return si.nTrackPos;
		//	}else {
		//		si.fMask = SIF_POS;
		//		if (::GetScrollInfo(hWnd,nBar, &si))
		//			return si.nPos;
		//	}
		//	return 0;
		//}
		//BOOL SetScrollPos32(HWND hWnd,int nBar, int nPos, BOOL bRedraw  = TRUE )
		//{
		//	SCROLLINFO si;
		//	si.cbSize = sizeof(SCROLLINFO);
		//	si.fMask  = SIF_POS;
		//	si.nPos   = nPos;
		//	return ::SetScrollInfo(hWnd,nBar, &si, bRedraw);
		//}
	private:
		LRESULT OnVScroll(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
		LRESULT OnHScroll(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
		LRESULT OnMouseWheel(UINT,WPARAM,LPARAM,BOOL&);
	};
}//namespace mycell