Userform Textbox Formatting

[LSM1604]

Hi all,

I'm a bit stuck with one of my userforms. I have a username textbox on my workbook logon screen. I have put a max length on the textbox to 7 characters. I have also added a bit of code which stops the user from entering anything less than 7 characters (once the commandbutton is clicked, a msgbox comes up), and the textbox will show text in upper case.

What I would like is a way to "format" the textbox. All of the usernames will be in the following format: BBAAA11. The first 2 characters will always be "BB". The 3rd, 4th and 5th characters will be any combination of letters (for example... "CAM", "EAL", "BEF"). Finally the last 2 characters will always be any combination of 2 digits (for example... "76" "24", "00").

If someone could provide me with some code which will not allow the textbox to type anything other than the specified format, or for a msgbox to appear once the commandbutton has been clicked to say that the incorrect format has been entered, I will be most grateful.


Thanks,

LSM

*cross posted @ http://www.mrexcel.com/forum/showthr...44#post2198644*