gtk:entry-buffer-insert-text (buffer pos text)

buffer -- a gtk:entry-buffer object
pos -- an integer for the position at which to insert text
text -- a string for the text to insert into the entry buffer

The unsigned integer with the number of characters actually inserted.

Inserts text into the contents of the entry buffer, at the given position. If the pos argument or the length of the text are out of bounds, or the maximum text buffer length is exceeded, then they are coerced to sane values. Note that the position is specified in characters, not in bytes.