gdk:window-begin-resize-drag (window edge button xroot yroot timestamp)

window -- a toplevel gdk:window object
edge -- a gdk:window-edge for with the edge or corner from which the drag is started
button -- an integer for the button being used to drag
xroot -- an integer for the root window x coordinate of mouse click that began the drag
yroot -- an integer for the root window y coordinate of mouse click that began the drag
timestamp -- an unsigned integer for the timestamp of mouse click that began the drag, use the gdk:event-time function

Begins a window resize operation for a toplevel window. This function assumes that the drag is controlled by the client pointer device, use the gdk:window-begin-resize-drag-for-device function to begin a drag with a different device.