oledll.h

这是一个基于COM的数据库访问技术

// OleDLL.h: interface for the COleDLL class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_OLEDLL_H__7DA2B130_2847_4F8A_A2BA_D40087A1E33F__INCLUDED_)
#define AFX_OLEDLL_H__7DA2B130_2847_4F8A_A2BA_D40087A1E33F__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class  COleDLLException
{
	UINT    m_nCause;
	HRESULT m_nHr;
	CComPtr<IUnknown> m_pUnknown;

public:
	COleDLLException(UINT _m_cause, HRESULT hr=0, CComPtr<IUnknown> m_spUnk=0);
	void DisplayError();
	void GetError(CString&);
};

class COleDLLError
{
public:
	COleDLLError();
	virtual ~COleDLLError();

	CString	GetErrorCtx();
	CString	GetErrorLoc();
	CString	GetErrorMsg();
	void	ClearErrors();
protected:
	virtual void SetError(CString msg, CString loc, CString ctx);

	CString mErrCtx;
	CString mErrLoc;
	CString mErrMsg;
};


class COleDLL  
{
public:
	COleDLL();
	virtual ~COleDLL();

};

#endif // !defined(AFX_OLEDLL_H__7DA2B130_2847_4F8A_A2BA_D40087A1E33F__INCLUDED_)