gtk-table-resize (table rows columns)

table -- the gtk-table widget you wish to change the size of
rows -- an unsigned integer with the new number of rows
columns -- an unsigned integer with the new number of columns

If you need to change the size of the table after it has been created, this function allows you to do so. The function gtk-table-resize has been deprecated since version 3.4 and should not be used in newly written code. Use the gtk-grid widget which resizes automatically.