There is only one difference between the stand alone Macros and embedded macro; they will not appear in the navigation pane under Macros Group.  They are written directly on Forms/Reports or on their control's event property.  When you make a copy of the Form or Report the embedded macros goes along with it.

Let us try and find out how embedded macros are created?

1. Open Microsoft Access2007.
2. Open a Report in Design View.
3. Press F4 or Alt+Enter to display the Property Sheet of the Report.
4. Click on the Event Tab of the Property Sheet.
5. Click on the On Load Event Property to select it.
6. Click on the Build (. . .) button at the right side of the property.

   

7. The Macro Builder option is already in selected state, Click OK Command Button to accept it.

   The Macro is open in Design View.  Title bar of the macro indicates Catalog:Report:On Load (the Report Name:Object Type:Event Type) where the macro will be embedded. 

8. Select MsgBox Action and type my Embedded Macro in the Message Action Argument.
9. Type On Load Info in the Title Argument of MsgBox Action.
10. Click on the Close Toolbar button to save and close the Macro.
11. Save and Close the Report.
12. Right-Click on the Report in the navigation pane and select Open to open the Report in Report View.  The embedded macro will run and you will see the message.
13. You can modify the macro by following steps 2 to 6.  You can add several actions in the Macro if needed.