请把下述代码加上异常处理。int MyWriteFile（CString strFileName, CString strText) { int nR

请把下述代码加上异常处理。

int MyWriteFile(CString strFileName, CString strText)

{

int nRet = 0;

CFile myFile;

myFile.Open(strFileName, CFile::modeWrite|CFile::shareExclusive|CFile::modeCreate,

NULL);

int nLen = strText.GetLength();

myFile.Write((char*)(LPCSTR)strText, nLen);

myFile.Close();

return nRet;

}

请帮忙给出正确答案和分析，谢谢！