How to concatenate strings, integers and floating point numbers without using objects?

I'd like to add information in a crash dump file, in case my application crashes.

Therefore I've created a __try-__except clause:

__try
{
  Do_Something();
}
__except (ShowCrashdumpInformation(_T(__FUNCTION__));

Instead of just __FUNCTION__, I'd like to add more information, but how can I do that?

The simpliest way is to use a CString, but this is blocked because of compiler error C2712 (Cannot use __try in functions that require object unwinding).

So, I'd like to use LPCTSTR strings (which are widely used in my application).

As a result it should look like (CString alternative):

CString temp; temp.Format(_T("Do_Something, int=[%d], float=[%f], string=[%s]), iParam, fParam, strParam);

Do anybody have an idea?
Thanks