HandleInsertSelection(w, event, params, num_params) Widget w; XEvent *event;			 String *params;			 Cardinal *num_params;
HandleInsertSelection( Widget w, XEvent *event,			 String *params,			 Cardinal *num_params)
HandleInsertSelection(w, event, params, num_params)Widget w;XEvent *event;			/* assumed to be XButtonEvent* */String *params;			/* selections in precedence order */Cardinal *num_params;{    if (SendMousePosition(w, event)) return;    _GetSelection(w, event->xbutton.time, params, *num_params);}