unicode下，读取数据库乱码问题

TCHAR cbContent[512];
dyn.GetFieldValue(0,cbContent,512);

// 中文会显示乱码

AfxMessageBox(cbContent);

// 编码转换
int nBufferSize = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)cbContent, -1, NULL, 0);
wchar_t *pBuffer = new wchar_t[nBufferSize+1];
MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)cbContent, -1 , pBuffer, nBufferSize*sizeof(wchar_t));

// 显示正常

AfxMessageBox(pBuffer);

delete[] pBuffer;

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