Gary
When you have a numeric keypad:
For inches (") press and hold the Alt type, type 034, release the Alt key.
For feet (') press and hold the Alt type, type 039, release the Alt key.

If you open Character Map in Windows and select a character you get Character Code 0x22 for ", which is hexadecimal for 34 and 0x27 is 39.
Google "ASCII characters using a numeric keypad".

Acorn

Acorn