How to Run a Macro Automatically When Workbook Opens in Excel

Many times we want to run some predefined and repetitive steps as the workbook opens or closes. For example, opening up a connection to the database, refreshing the pivot tables in the workbook or simply greeting the user. This can be done using Workbook Events of Excel.

In this article we will learn how you can run a macro as the workbook opens and closes in the most easy way. 

Auto Run Macro When Workbook Opens

To run macro as the workbook opens we will use Workbook Event Workbook_Open. The syntax of this event is this.

Private Sub Workbook_Open()

 'Your Code here.

End Sub

To write in a workbook event do this.

Open VBE using Alt+F11. Now in project explorer, locate the workbook in which you want to have the code. Now find ThisWorkbook object in project explorer. Double click on it.

 Now you can see two drop down above the coding area. Click on the first one and select
Workbook. Now all the available events related to the workbook can be seen in the right drop down. Click on it and choose open. This will write a pseudo or empty workbook_open sub routine on the coding area.

All the code that you want to run as the workbook opens needs to be written here. You can simply call subroutines written in any module in this event. This code will trigger the event to run anything written between these two lines.

 

Example:

Let's use the Workbook_Open event to verify a user and greet the user as the workbook opens.

Private Sub Workbook_Open()ps = 12345

pw = InputBox("Please enter the password.") + 0

If pw = ps Then

 MsgBox ("Welcome Sir!")

Else

 MsgBox ("Goodbye")

 ThisWorkbook.Close

End If

End Sub

Save the workbook and run the code once. Close the workbook. Now try to open it. The code will run as soon as the workbook opens.

You can put anything in this code. We can even call any subroutine from any module in the workbook.

Private Sub Workbook_Open()

 Call SplitWorkbook  ' calling subroutine that splits workbook

End Sub

So yeah, that is it. It is this simple to auto run a macro as the workbook opens. You can use it to refresh data, pivot tables and charts automatically. I hope my writing was explanatory enough and the site served you well. If this didn't help, write your query in the comments section below. I will reply to it as soon as possible.

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