macro to automatically change custom properties value

Hi.

I have some custom properties that I created in the property tab builder:

I want to build a macro for revision updates for a single file and for multiple file...

for single: when I press on it it will automatically change the design date to the current day's date and also or the approved date,

I want it to verify ask who is the approval and allow me to select from the list, and also ask me for the new revision details.

for multiple: same thing, only that I will need to select the folder in which the parts are.

will someone help please!  I have no clue on howw to write macros..  If you have some guide I would love to recieve it.

Ben