gtk-table-set-col-spacing (table column spacing)

table -- a gtk-table widget
column -- an unsigned integer with the column whose spacing should be changed
spacing -- an unsigned integer with the number of pixels that the spacing should take up

Alters the amount of space between a given table column and the following column. The function gtk-table-set-col-spacing has been deprecated since version 3.4 and should not be used in newly written code. Use the functions gtk-widget-margin-start and gtk-widget-margin-end on the widgets contained in the row if you need this functionality. The gtk-grid widget does not support per-column spacing.