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diff --git a/Master/tlpkg/tlperl/lib/auto/Tk/Listbox/BeginExtend.al b/Master/tlpkg/tlperl/lib/auto/Tk/Listbox/BeginExtend.al
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+# NOTE: Derived from ..\blib\lib\Tk\Listbox.pm.
+# Changes made here will be lost when autosplit is run again.
+# See AutoSplit.pm.
+package Tk::Listbox;
+
+#line 620 "..\blib\lib\Tk\Listbox.pm (autosplit into ..\blib\lib\auto\Tk\Listbox\BeginExtend.al)"
+# BeginExtend --
+#
+# This procedure is typically invoked on shift-button-1 presses. It
+# begins the process of extending a selection in the listbox. Its
+# exact behavior depends on the selection mode currently in effect
+# for the listbox; see the Motif documentation for details.
+#
+# Arguments:
+# w - The listbox widget.
+# el - The element for the selection operation (typically the
+# one under the pointer). Must be in numerical form.
+sub BeginExtend
+{
+ my $w = shift;
+ my $el = shift;
+ if ($w->cget('-selectmode') eq 'extended' && $w->selectionIncludes('anchor'))
+ {
+ $w->Motion($el)
+ }
+ else
+ {
+ # No selection yet; simulate the begin-select operation.
+ $w->BeginSelect($el);
+ }
+}
+
+# end of Tk::Listbox::BeginExtend
+1;