title: What is difference between Rules and validaton in infopath?
body: <p>I am working on Microsoft office infopath 2007.I have inserted the controls as text box and drop down. when i get right click to control there are 2 option links as Data validation and Rules. what are the main difference in between them? I am new in infopath so need guidance. </p>
  
  <p>when to use rules and when to use validations. can we customize validation and rules? and can we define custom rules and validation in infopath ?</p>