Using Module or function to find null values

Hi everyone,



I am currently learning to develop using Access and VBA, and is also working on a project.



Now i have a form with couple of textboxes bound to a table. When the user opens the form to enter records, i want to write a function that would go through the textboxes to check whether the textboxes are left NULL. Now i can write code on button click for each form, but i was wondering if its possible to write a function that could be called for each form that i have to check for null values.



Thanks.

Using Module or function to find null values