#ifndef _DLL_H
#define _DLL_H

class dll
{
	HINSTANCE h;
public:
	dll(): h(NULL)
	{
	}
	dll(LPCTSTR dllfile): h(NULL)
	{
		load(dllfile);
	}
	dll(const dll& self): h(NULL)
	{
		*this = self;
	}
	dll& operator=(const dll& self)
	{
		h = self.h;
		return *this;
	}
	FARPROC get_entry(LPCTSTR name)
	{
		if( !h )
			return NULL;

		return GetProcAddress(h, name);
	}
	bool load(LPCTSTR dllfile)
	{
		if( h )
		{
			TRACE("[dll] h != NULL\n");
			return false;
		}
		h = LoadLibrary(dllfile);
		return h != NULL;
	}
	void free()
	{
		if( h )
		{
			if( !FreeLibrary(h) )
			{
				TRACE("[dll] free library error, h = 0x%08lx\n", h);
			}
			else
				TRACE("[dll] freed library\n");
			h = NULL;
		}
	}
};
#endif	// _DLL_H