Well on declaring an object as in file
Code:
#include "stdafx.h"
#include<iostream.h>
#include "Pflow.h"



int main(int argc, char* argv[])
{
	printf("Hello World!\n");
	CPflowApp app;
	return 0;
}
and have included all the required project required files am getting Following Errors:
main.obj : error LNK2001: unresolved external symbol "public: __thiscall CPflowApp::CPflowApp(void)" (??0CPflowApp@@QAE@XZ)
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
Debug/main.exe : fatal error LNK1120: 3 unresolved externals
Error executing link.exe.

and the file Pflow.h the header file of my application class is given as:
Code:
// Pflow.h : main header file for the PFLOW application
//

#if !defined(AFX_PFLOW_H__BB6F1EE1_33AA_4DF5_AF29_7A8DC123B309__INCLUDED_)
#define AFX_PFLOW_H__BB6F1EE1_33AA_4DF5_AF29_7A8DC123B309__INCLUDED_

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

#ifndef __AFXWIN_H__
	#error include 'stdafx.h' before including this file for PCH
#endif

#include "resource1.h"       // main symbols

/////////////////////////////////////////////////////////////////////////////
// CPflowApp:
// See Pflow.cpp for the implementation of this class
//

class CPflowApp : public CWinApp
{
public:
	CPflowApp();
	int m_CurrentTool;

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CPflowApp)
	public:
	virtual BOOL InitInstance();
	//}}AFX_VIRTUAL

// Implementation
	//{{AFX_MSG(CPflowApp)
	afx_msg void OnAppAbout();
	afx_msg void OnBus();
	afx_msg void OnCapacitor();
	afx_msg void OnGenerator();
	afx_msg void OnLine();
	afx_msg void OnLoad();
	afx_msg void OnTransformer();
	afx_msg void OnUpdateBus(CCmdUI* pCmdUI);
	afx_msg void OnUpdateTransformer(CCmdUI* pCmdUI);
	afx_msg void OnUpdateLoad(CCmdUI* pCmdUI);
	afx_msg void OnUpdateLine(CCmdUI* pCmdUI);
	afx_msg void OnUpdateGenerator(CCmdUI* pCmdUI);
	afx_msg void OnUpdateCapacitor(CCmdUI* pCmdUI);
	afx_msg void OnText();
	afx_msg void OnUpdateText(CCmdUI* pCmdUI);
	afx_msg void OnDeleteBus();
	afx_msg void OnUpdateDeleteBus(CCmdUI* pCmdUI);
	afx_msg void OnDeleteCapacitor();
	afx_msg void OnUpdateDeleteCapacitor(CCmdUI* pCmdUI);
	afx_msg void OnDeleteGenerator();
	afx_msg void OnUpdateDeleteGenerator(CCmdUI* pCmdUI);
	afx_msg void OnDeleteLine();
	afx_msg void OnUpdateDeleteLine(CCmdUI* pCmdUI);
	afx_msg void OnDeleteLoad();
	afx_msg void OnUpdateDeleteLoad(CCmdUI* pCmdUI);
	afx_msg void OnDeleteTransformer();
	afx_msg void OnUpdateDeleteTransformer(CCmdUI* pCmdUI);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};


/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_PFLOW_H__BB6F1EE1_33AA_4DF5_AF29_7A8DC123B309__INCLUDED_)