CString m_pchData

[daniel9]

I´ve a problem with code from VC6

double Double()  const                          {return atof(m_pchData);}

Now I´ve Visual 2005 and I have no idea about the new syntax . Who can halp me.

[wildfrog]

What you got there seems OK. What error messages do you get?

- petter

[daniel9]

The error message:

error C2065: 'm_pchData': nichtdeklarierter Bezeichner

[wildfrog]

Did you remember to declare the variable 'm_pchData'?`
It would help if you posted some code? Maybe the whole class?

- petter

[Mike Harnad]

Visual Studio 6 declared m_pchData as a protected member of the CString class. Visual Studio .Net uses a template CString class CStringT that does not contain m_pchData. It appears that you are tring to access the character contents that are wrapped by CString. Why not use a function like GetBuffer()?

[JohnCz]

You must have derived your class from CString. That I think is completely unnecessary.
You can use CString object as if you were using pointer to a character string or use GetBuffer/GetBufferSetLength to manipulate CString buffer.

Since VS 7 (2002) there is no CString as it were in VS 6.0.

I do not have access to VS other than 6.0 (I am at my customer computer) but you can check how CString is defined in 2005. It is just a typdef that uses template ATL class (ATL::CStringT if I remember correctly).

[ovidiucucu]

Beside Mike and John already said.

Modify your code and use directly CString rather than the derivated class which gives you more troubles than benefits.
For example, that poor CStringDerived::Double function can be easily replaced in your code with atof(someCStringObject);