#ifndef _KTCADSYSVAR_H__
#define _KTCADSYSVAR_H__

#if _MSC_VER > 1000
#pragma once
#endif

template <typename T,BOOL bIsString = FALSE> class KTCADSysVar 
{
public:
	 KTCADSysVar(LPCTSTR pszVar,T t)
	 {
		 acedGetVar(pszVar,&m_rbOld);
		 struct resbuf rb;
		 if (bIsString)
		 {
			rb.restype = m_rbOld.restype;
			acutNewString(m_rbOld.resval.rstring,rb.resval.rstring);
		 }
		 else
		 {
			 memcpy(&rb,&m_rbOld,sizeof(resbuf));
			 memcpy(&rb.resval,&t,sizeof(t));
		 }
		 acedSetVar(pszVar,&rb);
		 if (bIsString)
			acutDelString(rb.resval.rstring);
		 m_sVarName = pszVar;
	 }

	 void ReSet(T t)
	 {
		 struct resbuf rb;
		 if (bIsString)
		 {
			rb.restype = m_rbOld.restype;
			acutNewString(m_rbOld.resval.rstring,rb.resval.rstring);
		 }
		 else
		 {
			 memcpy(&rb,&m_rbOld,sizeof(resbuf));
			 memcpy(&rb.resval,&t,sizeof(t));
		 }
		 if (bIsString)
			acutDelString(rb.resval.rstring);
		 acedSetVar(m_sVarName,&rb);
	 }

	 ~KTCADSysVar()
	 {
		 acedSetVar(m_sVarName,&m_rbOld);
	 }
private:

	CString m_sVarName;
	struct resbuf m_rbOld;
};

#endif //_KTCADSYSVAR_H__