How can I prevent a #N/A error when using VLOOKUP in Excel VBA?

You can prevent a #N/A error in Excel VBA's VLOOKUP by using the `Application.WorksheetFunction.VLookup` method within an `On Error Resume Next` block. If an error occurs (like #N/A), the variable will be assigned a default value or you can check if the lookup was successful. Alternatively, use `IfError` in your formula if you're not directly coding the VLOOKUP logic. For example: `On Error Resume Next result = Application.WorksheetFunction.VLookup(lookup_value, table_array, col_index_num, range_lookup) On Error GoTo 0 If IsError(result) Then MsgBox "Value not found" Else MsgBox "Found: " & result End If`