gtk:editable-chars (editable &key start end)

editable -- a gtk:editable object
start -- an integer with the start position, the default value is 0
end -- an integer with the end position, the default value is -1

The string with a sequence of characters from the editable widget.

Retrieves a sequence of characters. The characters that are retrieved are those characters at positions from the start position up to, but not including the end position. If the end position is negative, then the characters retrieved are those characters from the start position to the end position of the text. Note that positions are specified in characters, not bytes.