Are non-latin numerals in Windows SBCS codepages used by any Microsoft libraries to represent numerical data in C strings?

Question

I'm trying to write a parser for "text" files which I know will be encoded in one of the Windows single byte code pages. These files contain text representations of basic data types, and the spec I have for these representations is lacking, to say the least.

I noticed in Windows-874 ten little inconspicuous characters near the end called THAI DIGIT ZERO to THAI DIGIT NINE.

I'm trying to write this parser to be pretty robust but I'm working a bit in the dark as there are many different programs which can generate these data files and I don't have access to the sources.

What I want to know is: do any functions in Microsoft C++ libraries convert real number data types into a std::string or char const * (i.e. serialization) which would contain non-arabic-numerals?

I don't use Microsoft C++ libraries so can't reference any in particular but a made-up example could be char const * IntegerFunctions::ToString(int i).