Would it be easy to implement custom input fields?
Would be nice to be able to guide users in the right direction. For instance, 0000-nn to make sure they know the type of content they should be entering.
Not a huge issue, a nice to have.
Do you mean the placeholder?
I interpreted the question as a request for something like a MaskedEdit control.
(https://msdn.microsoft.com/en-us/library/windows/desktop/aa369797(v=vs.85).aspx)
Not quite @romanmg.
I’m speaking toward formatting what the users are able to enter.
0000-nn = number number number number (automatic -) letter letter.
So users are only capable of entering numbers for the first four, then letters for the last two.
Oh, I understand. Basically what @DaveA linked to. Nothing built-in like that, but you may be able to craft 2 text elements that have character limits. 1 element that is text (numbers only) and 1 element that is regular text.