This property corresponds to the Author field of the workbook's Properties dialog.

The following code example uses the Author property to set the author of the document to the current user, and then displays the author name.

This example is for a document-level customization.

Private Sub DisplayWorkbookAuthor()
    Me.Author = System.Environment.UserName
    MsgBox("The creator of this workbook is: " & _
        Me.Author)
End Sub

private void DisplayWorkbookAuthor()
{
    this.Author = System.Environment.UserName;
    MessageBox.Show("The creator of this workbook is: " +
        this.Author);
}

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

Reference