Writing Win32 Apps with C++: V2 - part 1

//resread.h
//	win32 cirtom resource reader

#pragma once
#include "dependency.h"
#include "stdx/smart.hpp"
#pragma message("including "__FILE__)

namespace GE_ { namespace winx {

	class string_or_id
	{
	public:
		operator LPCTSTR() const { return lpctstr; }
		string_or_id(LPCTSTR lp) { lpctstr = lp; }
		string_or_id(UINT n) { lpctstr = (LPCTSTR)LOWORD(n); }
	private:
		LPCTSTR lpctstr;
	};

	
	template<class ResData>
	class resource
	{
	public:
		struct derefexcp {};

		resource() {}
		resource(const resource& r) { pData = r.pData; }
		resource(const string_or_id& res_name, const string_or_id& res_type, HINSTANCE hInst=0)
		{
			if(!hInst) hInst = (HINSTANCE)GetModuleHandle(0);
			pData.New();
			pData->create(res_name, res_type, hInst);
		}
		typedef ResData resource_data;
		typedef ResData* resource_data_pointer;

		operator ResData*() const { return (!pData)?0: pData->pResData; }
		ResData* operator->() const { if(!Data) stdx::throw_excpptr<derefexcp>(); return pData->pResData; }
		ResData& operator*() const { if(!Data) stdx::throw_excpptr<derefexcp>(); return *pData->pResData; }

	private:
		friend class resource;
		struct data: public stdx::refcountable
		{
			HRSRC hRsrc;
			HGLOBAL hRes;
			ResData* pResData;

			void create(LPCTSTR res_name, LPCTSTR res_type, HINSTANCE hInst)
			{
				hRsrc = FindResource(hInst, res_name, res_type);
				if(hRsrc)
				{
					hRes = LoadResource(hInst, hRsrc);
					if(hRes)
					{
						pResData = (ResData*)LockResource(hRes);
						return;
					}
				}
			}
			void on_lastrelease()
			{
				UnlockResource(hRes);
				FreeResource(hRes);
				pResData = 0;
				hRsrc = 0; hRes = 0;
			}
		};
		typedef typename stdx::ptr<data>::strong data_p;
		data_p pData;
	};




	//////////////////////////////
	// TOOLBAR RESOURE HANDLING
	#ifndef RT_TOOLBAR
	#define RT_TOOLBAR  MAKEINTRESOURCE(241)
	#endif

	struct toolbardata
	{
		WORD wVersion;
		WORD wWidth;
		WORD wHeight;
		WORD wItemCount;
		//WORD aItems[wItemCount]

		WORD* items()
			{ return (WORD*)(this+1); }
	};

	typedef resource<toolbardata> HSTOOLBAR;	

}}