Yet another alternative is to disable the other textboxes, i.e. set their Enabled property to .F.
Then they can't even get focused with the mouse. When that is done, you could also use labels instead of disabled textboxes, because all the user can use them for is reading their value. The only reason for using textboxes that are not able to be activated controls users can also enter into is to display information, isn't it? I'd be careful using disabled textboxes for that purpose, as values too long to read are also not scrollable, whereas a lable can automatically adjust its size and also allows wordwrap. The only disadvantage is you can't set a label caption with a controlsource from data and would need to set the label captions by code.
I wonder about the reasoning beacuse depending on what's in the other textboxes removing the capability to tab to them can be a bad choice. A user could also simply use SHIFT+TAB in text2 to go back to text1. It's even apparent from the keyboard icon on the tab key, if it's a keybboard not simply having "TAB" written on that key, but having the symbol of a left arrow over a right arrow. The left arrow is what you get with SHIFT+the key, just like all the symbols on top of the digit keys in the top row of the main keyboard block (ignoring the F key row).
So, in short, just make users aware they can go forth AND back with the TAB key, esepcially if there is no reason to keep users away from all the other textboxes.
Chriss