XmTextFieldCopyLink man page
XmTextFieldCopyLink — A TextField function that copies a link to the primary selection to the clipboard
#include <Xm/TextF.h> Boolean XmTextFieldCopyLink( Widget widget, Time time);
XmTextFieldCopyLink copies a link to the primary selected text to the clipboard. This routine calls the XmNconvertCallback procedures, possibly multiple times, with the selection member of the XmConvertCallbackStruct set to CLIPBOARD and with the parm member set to XmLINK. The TextField widget itself does not copy any links; XmNconvertCallback procedures are responsible for copying the link to the clipboard and for taking any related actions.
Specifies the TextField widget ID.
Specifies the time of the transfer. This should be the time of the event which triggered this request. One source of a valid time stamp is the function XtLastTimestampProcessed.
For a complete definition of TextField and its associated resources, see XmTextField(3).
This function returns False if the primary selection is NULL, if the widget does not own the primary selection, if the function is unable to gain ownership of the clipboard selection, or if no data is placed on the clipboard. Otherwise, it returns True.