How to Save User Defined Function (SpellNumber) in Excel to work with it on all workbooks? (By One OF MY FRIEND --NB--)

Here's a refined version of your instructions for clarity and readability:

Step-by-Step Guide to Creating and Using a SpellNumber Add-In in Excel

Follow these steps to create a custom Add-In that converts numbers to words in Excel:

Step 1: Create the Add-In

1. Open a New Workbook: Open Excel and press Alt + F11 to open the VBA editor.
2. Insert the Code:
   • Paste the VBA code for converting numbers to text (words) into the module.
3. Save as Add-In:
   • Go to File > Save As.
   • Select the file type as Excel Add-In:
     • For older versions (Excel 97-2003), choose Add-In 97-2003.
     • For newer versions (Excel 2007 and later), choose the simple Add-In option.
   • Save the file with a memorable name (e.g., SpellNumber).
4. Close the VBA Editor: Press Alt + Q to close the VBA editor.

Step 2: Enable the Add-In in Excel

1. Open Excel Options:
   • Open a new Excel workbook.
   • Click Office Button (Excel Menu) > Options > Add-Ins.
2. Manage Add-Ins:
   • At the bottom of the Add-Ins window, under Manage [Excel Add-Ins], click Go.
3. Activate the Add-In:
   • In the pop-up box, you will see a list of available Add-Ins, including the newly created SpellNumber.
   • Check the box next to SpellNumber and click OK.

Step 3: Use the SpellNumber Function

1. Enter a Number:
   • Type a numeric value into any cell.
2. Insert the Function:
   • Go to the Formulas tab and click Insert Function.
   • In the Category dropdown, select User Defined Functions.
   • Find and select the SpellNumber function.
3. See the Result:
   • Once selected, the SpellNumber function will convert the numeric value into text.

Enjoy the solution!

About User-Defined Functions (UDFs) in Excel

Excel allows you to create custom formulas, known as User-Defined Functions (UDFs), using VBA. These can be used just like built-in functions such as SUM() or VLOOKUP(). UDFs expand Excel's functionality, especially for advanced calculations or text manipulations.

Example: Celsius to Fahrenheit UDF

Here's a simple example of a UDF to convert temperatures from Celsius to Fahrenheit:

Function CtoF(Centigrade As Double) As Double
    CtoF = Centigrade * 9 / 5 + 32
End Function

To use:

1. Enter a Celsius value in a cell.
2. Apply the CtoF function in another cell to get the Fahrenheit equivalent.

With these steps, you can create and use custom UDFs for various tasks in Excel. Let me know if you need help with any specific function or task!