PowerPoint TextBox1 Event code needed. Very simple.

I have a text box in my ppt window.

I have enabled developer options tab.

I need a VBA code or something like..

The task is

If textbox1.text="abc" then

Go to next page or a specific page no

Else

Msgbox"invalid input"

This event must done when I press enter button after entering text into the box.

Thanks in advance.