Create a new module:
Option Compare Database
Function properau(field As Control)
field = StrConv([field], vbProperCase)
End Function
Save module and call it lets say proper.
If you have created a form based on your table and lets
say the fieldname you want to capitalize the first letter
of is named LastName.In the properties of that field go to
the after_update and type in the following:
=properau([LastName])
regardless if you use uppercase or lowercase, after you
press enter to move to the next field, the first letter of
LastName will capitalise