I want to create a file with my own extension for e.g (.abp)
and I want to combine and merge 2 or more files to it.
something like making a zip file, but with my own extension that no others can open the file.
please help me how can I do this
and the important part is if I do this, then how can I extract those files that has been combined to one file and read or use them?
suppose that I want to make a file named (combined.cmb) and add one word document file and a spreadsheet file and one mp3 file to it.
and then how can I extract these three files back to read them?