Yes there are another ATL headers within the code too; you first offered to Google the header files, but I could not find it anywhere, and then to find another solution would be to write a new http wrapper in c++ that would be another project itself. Probably only way I have is to get all the atl header files and use them, which I can't find anywhere . What I need is a link or a source ;

Use VS. As I understand it, there's even a free version (possibly named "express"?). That header containing the atlbase.h requirement is telling the compiler to look for function bodies in the atlbase.lib. THAT library, which is "part" of Visual Studio is typically used in conjunction with MFC. And finally, it is highly unlikely that any MFC/ATL code you ran across and downloaded off the www will compile and link without some flavor of Visual Studio installed on your development box.

If you wait until the end of November 2021 to purchase Visual Studio you will also be required to install it on a 64-bit computer. It will be a dedicated 64-bit installation and then be able to address more than 4GB of memory.