这段程序有什么缺点？？？

[zhongxingjun]

//Log.h
class CLogInfo
{
public:
CLogInfo(_bstr_t finename)
{
wchar_t* p=wcsrchr((wchar_t*)finename,L'\\');
if(p!=NULL)
{
p++;
m_sFileName=p;
}
}
~CLogInfo()
{
}

private:
_bstr_t FileName;
};


#ifndef __COMERROR_H__
#define __COMERROR_H__

#include "Log.h"

#define COMTRY { CLogInfo __log(_T(__FILE__));COMHR __comHr; try

#define COMCATCH() catch (_com_error &ex)
#define ALLCATCH() catch(...)

#define REPORT() __log.Code=ex.Error();
#define REPORTH() __log.Code=ex.Error();return __log.Code;
#define REPORTV() __log.Code=ex.Error();return ;

#define RETURNV() return
#define RETURNE() return E_FAIL
#define RETURNH() return ex.Error()

#define COMEND }

#endif


问：这段宏定义如果带入程序中去会有哪些弊端？