Thanks by your words.
I'll keep the code updated with the latest Delphi development. I just wanted to release the preview before doing it.
The functions were added in LCL extensions as soon they were needed in VTV and ATBinHex, there's no other reason. In the future other functions/constants can be added.
ATBinHex does not pre load the file, so it uses only the memory needed to display the current page/contents. I tested with a 600MB file (the bigger i have)
Feel free to add bug reports and/or suggestions/patches