Need code for ms excel

Prr1234 

If I understand correctly, you want to create a VBA code that allows a user to enter a four-digit number, and the program will decode each digit of that number based on a predefined decryption key (2801 in this case). If a digit is not specified in the decryption key, it will remain unchanged.

Here's a VBA code that implements this functionality:

Vba Code is untested, please backup your file.

Sub DecryptNumber()
    Dim decryptionKey As String
    Dim inputNumber As String
    Dim decryptedNumber As String
    Dim i As Integer
    
    ' Define the decryption key
    decryptionKey = "2801"
    
    ' Get the input number from the user
    inputNumber = InputBox("Enter a four-digit number:")
    
    ' Check if the input number is valid
    If Len(inputNumber) <> 4 Or Not IsNumeric(inputNumber) Then
        MsgBox "Invalid input. Please enter a four-digit number."
        Exit Sub
    End If
    
    ' Decrypt each digit in the input number using the decryption key
    decryptedNumber = ""
    For i = 1 To Len(inputNumber)
        If Mid(decryptionKey, i, 1) <> "" Then
            decryptedNumber = decryptedNumber & Mid(decryptionKey, i, 1)
        Else
            decryptedNumber = decryptedNumber & Mid(inputNumber, i, 1)
        End If
    Next i
    
    ' Output the decrypted number
    MsgBox "Decrypted number: " & decryptedNumber
End Sub

This code prompts the user to enter a four-digit number, decrypts each digit of that number based on the decryption key (2801), and then displays the decrypted number in a message box. If a digit is not specified in the decryption key, it remains unchanged.