msgbox is not definedat CommandButton1 Click

The error message "msgbox is not defined at CommandButton1 Click" suggests that the code is trying to use the `msgbox` function, but it is not recognized as a valid function.

To resolve this issue, you need to ensure that the `msgbox` function is properly imported or declared in your code. In VBA (Visual Basic for Applications), which is commonly used in Microsoft Office applications, you should use `MsgBox` instead of `msgbox`.

Make sure you have the following line at the beginning of your code:

Option Explicit

This line enforces variable declaration and helps catch any typographical errors.

Additionally, ensure that you have the correct syntax for using `MsgBox`. It should be written as:

MsgBox "Your message here"

If the issue persists, please provide more details or share the relevant code snippet so that I can assist you further.