Prompt Title: Highlight Codes in Excel

Yes, you can use the VLOOKUP formula to achieve the desired result. Here's how you can do it:

1. Create a new sheet in your Excel workbook or use an existing one to enter the list of codes you want to highlight.

2. Enter the desired codes in column A of the new sheet, starting from cell A1.

3. Go back to the big data sheet where you want to apply the conditional formatting.

4. Select the range of cells that you want to apply the formatting to. This will depend on your data structure and where the codes are located. Let's assume you want to highlight the entire rows based on matching codes in column A.

5. Click on the "Home" tab in the Excel ribbon.

6. In the "Styles" group, click on the "Conditional Formatting" button, and then select "New Rule" from the drop-down menu.

7. In the "New Formatting Rule" dialog box, select "Use a formula to determine which cells to format."

8. In the "Format values where this formula is true" field, enter the following formula, assuming your codes are in column A on the big data sheet and the new sheet is named "Codes":

   =NOT(ISNA(VLOOKUP($A1,Codes!$A:$A,1,FALSE)))

   Adjust the column letter and row number in the formula to match your data structure and range.

   This formula checks if the value in column A of the big data sheet (your data) exists in column A of the "Codes" sheet using the VLOOKUP function. The ISNA function checks if VLOOKUP returns an error (indicating that the code is not found), and NOT converts the result to TRUE for highlighting.

9. Click on the "Format" button to choose the formatting style you want to apply to the highlighted cells or rows. You can select a different font color, fill color, or any other formatting option.

10. Once you've applied the formatting style, click on the "OK" button.

11. The conditional formatting rule will be applied, and any rows in the big data sheet that match the codes in your list will be highlighted.

By using the VLOOKUP formula, you can directly reference the list of codes without needing a separate sheet for the codes.