How to change the input text to uppercase as the user types?
Upper case is also known as capital letters.
For a CSS solution, add a style property with value "text-transform: uppercase" in your Input's Extended Properties.
The user will see the text as uppercase letters, but the "real" text is not affected and will be submitted as typed. If you need the text in uppercase, use the built-in ToUpper() action in the server.
The example below ensures that the variable Session.Products_SearchKeyword is uppercase:
If you're using the CSS code above in multiple inputs, it's easier if you create a style for it in your theme, and then apply it to the input fields, as shown below.