While this appears to be an unusual request, I think that you can complete this task by employing a little bit of code
In the afterupdate event for the original text box (assume name is mytxt) enter this code:
Code:
me.txt1.value=me.mytxt.value
me.txt2.value=me.mytxt.value
.
.
.
me.txt15.value=me.mytxt.value
End Sub
each of the other 15 text boxes are named txt1, txt2.....etc
change the textbox names to your control names. I would be curious as to how you are using this and why you need to have this set up.
Alan