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/6273.aspxMon, 25 Oct 2004 21:17:24 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:6273Greg Collins0https://www.infopathdev.com:443/forums/thread/6273.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=6273What you are looking for is custom data validation.<br /><br />In the Text Box Properties dialog box, click Data Validation. Here you can create conditions such that: If the text box is blank, and the drop-down list is not X, then provide an error which says "Box must be filled in".<br /><br />Greg Collins [InfoPath MVP]https://www.infopathdev.com:443/forums/thread/4480.aspxMon, 25 Oct 2004 08:33:00 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:4480kastigeer0https://www.infopathdev.com:443/forums/thread/4480.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=41&PostID=4480I'm looking for a way to programatically (any language) set a control/Data source node (text box to be specific) to be "cannot be blank" at runtime.<br /><br />There are a number of field that need to be filled in, but each one is conditional on a drop down list, and if a non-default value in the drop down-list is selected then a value must be entered in the associated text box.<br /><br />Any suggestions on this would be much appreciated!<br /><br />thanks<br />Barry