How to see all bytes of a raw image

I am working with images in c++, i have a program that capture a image the result data is this

Result image buffer

then when a write the image in other folder I get this result:

Result image written

CFileException ex;

CFile file;
file.Open((LPCTSTR)"test", CFile::modeCreate | CFile::modeWrite | CFile::modeNoTruncate, &ex);
file.Write(image.puc_image, lenOfImage)

when I open the file with the note.

so basically I want to manipulate the data that a write and convert to base 64 and then send to an API. but I never see all the data when a read the file. so the convention of base64 don't output correctly the data.