func_out.cpp

关于使用VC编程的代码

// Func_Out.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include "Func_Out.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//
//	Note!
//
//		If this DLL is dynamically linked against the MFC
//		DLLs, any functions exported from this DLL which
//		call into MFC must have the AFX_MANAGE_STATE macro
//		added at the very beginning of the function.
//
//		For example:
//
//		extern "C" BOOL PASCAL EXPORT ExportedFunction()
//		{
//			AFX_MANAGE_STATE(AfxGetStaticModuleState());
//			// normal function body here
//		}
//
//		It is very important that this macro appear in each
//		function, prior to any calls into MFC.  This means that
//		it must appear as the first statement within the 
//		function, even before any object variable declarations
//		as their constructors may generate calls into the MFC
//		DLL.
//
//		Please see MFC Technical Notes 33 and 58 for additional
//		details.
//

/////////////////////////////////////////////////////////////////////////////
// CFunc_OutApp

BEGIN_MESSAGE_MAP(CFunc_OutApp, CWinApp)
	//{{AFX_MSG_MAP(CFunc_OutApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFunc_OutApp construction

CFunc_OutApp::CFunc_OutApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CFunc_OutApp object

CFunc_OutApp theApp;

extern __declspec(dllexport) CString Encode(CString strData, int nKey)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());
	int nIndex,nCount,nBase;
	char ch;
	CString strResult;

	strResult = strData;
	nBase = (int)'a';
	nCount = strResult.GetLength();
	for(nIndex=0;nIndex<nCount;nIndex++)
	{
		ch = strResult.GetAt(nIndex);
		ch = (char)( ((int)ch - nBase + nKey )%26 + nBase );
		strResult.SetAt(nIndex, ch);
	}
	return strResult;
}

extern __declspec(dllexport) CString Decode(CString strData, int nKey)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());
	int nIndex,nCount,nBase;
	char ch;
	CString strResult;

	nBase = (int)'a';
	strResult = strData;
	nCount = strResult.GetLength();
	for(nIndex=0;nIndex<nCount;nIndex++)
	{
		ch = strResult.GetAt(nIndex);
		ch = (char)( ((int)ch - nBase - nKey + 26)%26 + nBase );
		strResult.SetAt(nIndex, ch);
	}
	return strResult;
}