How can we make these types of files

Hi To All
Warm Greetings,

Friends I am attaching two file by the name of "fish" & "Sun rise and Sun set in Hong Kong", can anyone tell me how these types of files are made as these files are not containing any macros I have checked it through Alt+F11.

If anyone understands well like what software, technique or technology have been used, I request them to please guide me to how to create such types of files, I have some work that I want to add in similar way as creator of these files have done.

I would be really very thankful to the people who can resolve my this query as I have been searching information on these files on Google & till date I have not got any good direction guidance.

Thanks & Regards