I am new to word and Macros so this more than likely easy

I have a form with some check and text boxes on it

if a user checks a check box and then later on enters a value in a text
field I want it to check the check boxs and see if it is true, if so I want a
value from another text box entered into other text boxes. i tried this but
no luck

If check4 = True Then
text15 = text11
text18 = text11
End If

thanks