VBA Function: Display Message When A > B

VBA Function to Display a Message When A is Greater Than B

Overview

This document outlines a VBA function that checks if A is greater than B and displays a message saying "Hello" if the condition is met. Detailed steps, including input validation and inline comments, must be included for clarity and robustness of the code.

VBA Code

' Function to check if A is greater than B and display "Hello"
Sub CheckAndDisplayMessage(A As Variant, B As Variant)
    ' Documentation Block
    ' -------------------
    ' Purpose:
    '   This function checks if the value of A is greater than B and displays a message "Hello" if the condition is met.
    '
    ' Parameters:
    '   A (Variant): The first value to be compared.
    '   B (Variant): The second value to be compared.
    '
    ' Return Type:
    '   None. This function does not return any value.
    '
    ' Exceptions:
    '   Raises an error if inputs are not numeric.
    
    ' Input Validation
    If Not IsNumeric(A) Then
        MsgBox "Error: The value of A is not numeric.", vbCritical
        Exit Sub
    End If
    
    If Not IsNumeric(B) Then
        MsgBox "Error: The value of B is not numeric.", vbCritical
        Exit Sub
    End If
    
    ' Main Logic
    If A > B Then
        MsgBox "Hello"
    End If
End Sub

Usage Example

To utilize this function in a practical scenario, follow these steps:

1. Open the VBA editor in Excel by pressing Alt + F11.
2. Copy and paste the above code into a new module.
3. Run the function with sample inputs to see how it operates.

Here is an example of how to run the function:

Sub TestCheckAndDisplayMessage()
    ' Call the function with sample values for A and B
    CheckAndDisplayMessage 10, 5    ' A is greater than B, should display "Hello"
    CheckAndDisplayMessage 3, 7     ' A is not greater than B, should not display anything
    CheckAndDisplayMessage "text", 7  ' A is not numeric, should display an error
End Sub

Summary

This function performs a basic check and displays a message under specific conditions. It includes necessary documentation, input validation, and example usage to ensure it is easy to understand and use. For more comprehensive learning and advanced VBA techniques, consider exploring courses on the Enterprise DNA Platform.