gtk-clipboard-request-contents (clipboard target func)

clipboard -- a gtk-clipboard object
target -- a gdk-atom as a string representing the form into which the clipboard owner should convert the selection
func -- a gtk-clipboard-received-func callback function to call when the results are received, or the retrieval fails, if the retrieval fails the length field of the gtk-selection-data instance will be negative

Requests the contents of the clipboard as the given target. When the results of the result are later received the supplied callback function will be called.