Nick,
If you are talking about input on a form, you can do effect the input in a number of ways.
I'm sure many people will have other suggestions, but here are mine. Right click the text box (input box) and go to the properties.
1) One of the properties of the text box is input mask (I don't like these very much) you can format the input into the text box to make sure the first letter is in capitals
or
2) In the 'AfterUpdate event' on the same text box your can add some code to effect what has just been inputted. Just what SJ McAbney said.
or
3) Finally, you could have a mess with 'On Change' and maybe 'On Key Press' to see if these events suit your input better. But I usually use AfterUpdate
Otherwise...
If you want to input straight into the Table, go to the design view and select the field e.g. SurName and then one to the properties is like 1) 'Input Mask'
but I nave never used this and I don't know how this might effect forms, queries etc.. later on.
But the syntax is (cut and paste this into the table properties next to inputmask) >L<?????????????
This will make 'dog' into 'Dog' and 'DOG' into 'Dog'
Hope this helps
Brett