access vba course - Vba Message Box

Hello,

I would like to create a message box where it will say: "Copy yesterday's data?". If the user replies yes, then i want it to execute the macro that i have created in VBA (named Main) eitherwise do nothing. So far, my macro lloks like this:

Sub Main()

Application.ScreenUpdating = False
Prices
Weights
Values
Exit Sub

Dim reply As Integer

reply = MsgBox("Copy Yesterday's Data?", vbYesNo)
If reply = vbYes Then

Else
Resume
End If



I am not sure what to add after the THEN in order to make it run the MAIN sub. any help will be greatly appreciated.