Find and Replace Text with Form

Novice needs some help. I am enough of a hack to read some sample code and modify it to what I want to do, but I am having some trouble finding info on doing this, if possible:

I have created a macro that brings up a form. The Form prompts the user with a textbox. The user types in a six-digit number and clicks OK. Then the macro searches for a string of text, specifically "XXXXXX". Here is where I am stumped: Replace the "XXXXXX" with the six-digit number. Then the macro will go on to print the document.

I have tried Text.Replace, but I can only get it to work with quotes around the new text, which doesn't allow me to reference the input in the textbox.

Can this be done?

Sorry, actually I found out it does work. Nice and simple like. Just like it was intended to.