https://www.infopathdev.com:443/forums/41.aspxIf you're not sure where to ask your question, ask it here. If necessary, our moderators will make sure it gets classified in the correct board.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/93756.aspxFri, 18 Oct 2013 08:17:29 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:93756wilkies0106aw0https://www.infopathdev.com:443/forums/thread/93756.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=93756<p>&nbsp;You could use a 2nd field and display the choice as a calculate value.</p><p>If uses can&#39;t change the original choice field you&#39;ll need to write a rule perhaps in a section to hide the original choice control and only show the chosen value.</p><p>&nbsp;</p><p>As for your rule.&nbsp; I quickly put together the following. I&#39;m sure you might be able to do it quicker too.</p><p>Field1 - your character text - on your form<br /></p><p>Result (hidden) - with the default value of sting-length(field1)<br /></p><p>Warning Text field - only to appear if there are too many characters in field 1 - use section to show or hide.<br /></p><p>On the Result field I used the following formula Result&gt;5 set field value of warning text to too many characters.<br /></p>https://www.infopathdev.com:443/forums/thread/93752.aspxThu, 17 Oct 2013 19:14:17 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:93752Tom Donaldson0https://www.infopathdev.com:443/forums/thread/93752.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=93752<p>I have a field on the form that is prefilled with prefix characters based upon a choice field elsewhere in the form. The requester is to enter in subsequent characters however we do not want them to overwrite the prefix characters. How can I block the prefix characters?</p><p>I also would like to ensure that the field must contain 5 or more characters (including the prefix). How would I write that as a rule?&nbsp;</p>