How do I determine the implementation flles for the followng crypto++ programs?

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C++

I wrote the following programs based on crypto++ as part of an application and tried to run the app after appropriately adding a crypto++ dynamic link library compiled from source code obtained from the official Crypto++ GitHub repository. Unfortunate visual studio reported a linkage error that had to do with std::string. After making efforts for some hours to resolve the linkage error, I decided it is best I work with the source code such that I can easily locate error points. I tried to use the header files to determine the implementation files but only ended up with linkage errors.

How can one determine all the necessary implementation files for a program.


//The basic header files

include "modes.h"
#include "aes.h"
#include "filters.h"
#include "rijndael.h"
#include "osrng.h"

First program

std::string encryptMessage(const std::string& message, const std::string& key)
{
    using namespace CryptoPP;
    byte iv[AES::BLOCKSIZE];
    memset(iv, 0x00, AES::BLOCKSIZE); // Initialize IV to all zeros
    std::string encryptedMessage;
    try
    {
        CBC_Mode<AES>::Encryption encryption;
        encryption.SetKeyWithIV((const byte*)key.data(), key.size(), iv);
        StringSource(message, true,
            new StreamTransformationFilter(encryption,
                new StringSink(encryptedMessage)
            )
        );
    }
    catch (const Exception& ex)
    {
        UNREFERENCED_PARAMETER(ex);

        return std::string();
    }
    return encryptedMessage;
}

The second program

std::string decryptMessage(const std::string& encryptedMessage, const std::string& key)
{
    using namespace CryptoPP;
    byte iv[AES::BLOCKSIZE];
    memset(iv, 0x00, AES::BLOCKSIZE); // Initialize IV to all zeros
    std::string decryptedMessage;
    try
    {
        CBC_Mode<AES>::Decryption decryption;
        decryption.SetKeyWithIV((const byte*)key.data(), key.size(), iv);
        StringSource(encryptedMessage, true,
            new StreamTransformationFilter(decryption,
                new StringSink(decryptedMessage)
            )
        );
    }
    catch (const Exception& ex)
    {
        UNREFERENCED_PARAMETER(ex);

        return std::string();
    }
    return decryptedMessage;
}

The third program

std::string CreateKey()
{
    CryptoPP::AutoSeededRandomPool prng;

    byte Key[CryptoPP::AES::DEFAULT_KEYLENGTH];

    prng.GenerateBlock(Key, sizeof(Key));

    std::string stKey;
    for (int i = 0; i < CryptoPP::AES::DEFAULT_KEYLENGTH; i++)
    {
        stKey.push_back(Key[i]);
    }

    return stKey;
}

What I have tried:

I spent two days trying to resolve the associated issues with numerous googlng.