Hello, I need some help. I need to create a macro that will run when the project opens up and stays in the background. I need this macro, to popup a message box stating "Perform a RVR" whenever the user enters a value of 1600 or less on the activerow, in column m26. Another catch is the user might enter 1600 in another active row say m28. So basically i need it to cover m26,m28,m30 and so on.