This example demonstrates custom
"Textarea properties" popup.
Here you can edit properties of the existing
textarea element via context menu.
Also you can insert new
textarea with

toolbar button.
See the source code in
cs_Custom_Textarea_popup.aspx,
vb_Custom_Textarea_popup.aspx,
__cs_textarea.aspx and
__vb_textarea.aspx
files of downloaded
Suite.