MFC 获取临时目录 && 动态修改菜单栏

获取系统临时目录，并且声称临时文件，返回临时文件路径

TCHAR lpPathBuffer[BUFFERSIZE];
		TCHAR szTempName[BUFFERSIZE];
		DWORD dwRetVal = GetTempPath(BUFFERSIZE, lpPathBuffer);
		if (dwRetVal > BUFFERSIZE || 0 == dwRetVal)
		{
			return;
		}
		if (0 == GetTempFileName(lpPathBuffer, "TBS", 0, szTempName))
		{
			return;
		}
		m_strTmpFile = szTempName;
		if (!m_tmpFileHandle.Open(m_strTmpFile, CFile::modeReadWrite | CFile::modeCreate, 0))
		{
			return;
		}

动态修改菜单项，比如点击之前是“start”，点击之后变为“stop”

CMenu* pMenu = this->GetMenu()->GetSubMenu(9);
		if (NULL != pMenu)
		{
			pMenu->ModifyMenu(ID_SCRIPT_RECORDPYTHONFILE, MF_STRING | MF_BYCOMMAND, ID_SCRIPT_RECORDPYTHONFILE, _T("Save Python File"));
			this->DrawMenuBar();
		}