Latest Release: Tcl/Tk 9.1a0 (Jul 30, 2025)
Tcl/Tk 9.1a0 is the current development work on Tcl and Tk,
aiming toward stable releases in September 2026. They add new features
and interfaces to the foundation of Tcl/Tk 9.0.
Download Tcl/Tk 9.1a0 Source Releases
Highlights of Tcl 9.1
- New subst options: -backslashes, -commands, -variables.
- New C routine Tcl_IsEmpty.
- New C routine Tcl_GetEncodingNameForUser.
- New C routine Tcl_AttemptCreateHashEntry.
- New C routines Tcl_ListObjRange, Tcl_ListObjRepeat, Tcl_ListObjReverse.
- Improved list internals for memory efficiency of large lists.
- .... and more under development....
Highlights of Tk 9.1
- Handling of negative screen distances.
- Extended states in ttk::treeview and ttk::notebook
- Improvements to Tk_CanvasTextInfo
- Removed obsolete support for Windows XP appearances.
- .... and more under development....
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