Sorry, should have explained better...

I have a textbox called txtSendStudent (stupid name but running out of ideas
at present). I have created a field called Student and have bound the textbox
to this field.

I now have the code you gave me and it works...sort of.

If I fill out the initial email and click SEND the message is sent with the
subject being "Round Robin for" being shown. When I forward the form back
then the subject changes to "Round Robin for student name".

The desired effect but I want it to change the subject before the initial
send and not once the form is returned.