How to will it be?

[meenctg]

I created a form of my db table. I want to show a pop up message about field rule when a user entry data. please see my attached photo for better understand.

would any body suggest or help me to do this task?

 

[mistera]

You could include an embedded macro or event procedure (depending on the complexity of the validation) on the BeforeUpdate event on the field where data is entered. It can perform the validation and then pop-up a message using the MsgBox statement depending on the result of the validation. If you don't want to have the update actually complete, just include a Cancel = True statement in the code.