Macro that detects if specific cells are blank, does a pop up

Hello,

I want to develop a macro that detects if one or both specific cells on a sheet are blank, and then creates a popup window if this is the case. The pop up can just say "stop, and fill in the blanks" and the with a okay button.

I will have other macros set to run after this that are already built. Should the above macro not get activated by the blank cells I want it to proceed to the next macros. If the pop up is triggered, in want the rest of the process to terminate, and not proceed to the next macros.

Thanks!

Lora

Thank you for your help - I actually used something very similar that worked out. I used the following:

If Range("A1,A4") = "" Then
MsgBox "Fill in all cells"
Exit Sub
End If
'rest of code