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This is the actual state:

In idl file:

interface IProblem : IDispatch{
[propget, id(1)] HRESULT miProblema([out, retval] ISolver** pVal);
[propput, id(1)] HRESULT miProblema([in] ISolver*...

I have an C++ ATL COM DLL (VS2015) with two ATL Clasess, and I would like to add one of them as a member of the other ATL class.

How should I do it?

I tried adding the member as the type...

This is the code

char number[]="0.58";
double value = atof(number);

When I execute it value is 0.57999999999999996

Do you know why?

Thanks in advance

Not to a simple function. To a function in a atl dll.
Thanks

Hi,
I'm developing a DLL Atl com. I want pass as parameter one array of doubles.

I read the best form to do it is with VARIANT* parameter in C++ and manage ir as SAFEARRAY. But It seems very...

I have to define variable two times? in header and in cpp files? It get value of variable in header file?
Thanks

I have put it in every .h files but I get same error.
I have:


#ifndef _CONSTANTS_H_
#define _CONSTANTS_H_
// definitions
#endif

Hi, I'm newbie in c++.
I have 2 cpp files, and their 2 .h files. I have another .h file with constant too.
The first cpp file use the second cpp file. And First ands second file are using...