Release History

Telerik UI for WinForms 2026.1.415

April 15, 2026

What's new

NEW

• RadForm — Implemented UI Automation support.
• RadTitleBar — Implemented UI Automation support.
• RadPanel — Implemented UI Automation support.
• RadRichTextEditor - Introduced support for raising the HyperlinkClicked event when clicking a hyperlink that points to a bookmark in the document.
• .NET Core Designer — Added support for the .NET globalization invariant mode.

Common

Dependencies

• Telerik Document Processing Library (DPL) version has been updated to 2026.1.402.
• The minimum required Telerik Licensing version has been updated to 1.8.2.

.NET Core Designer

NEW

• Added support for the .NET globalization invariant mode.

RadCheckedDropDownList

FIXED

• The CheckAllItem was hidden after scrolling to the bottom and then back to the top.

RadCommandBar

FIXED

• The CommandBarButton.Click event was incorrectly fired when clicking with the right or middle mouse button.

RadContextMenu

FIXED

• An incorrect pop-up size was displayed when the pop-up content was changed in the PopupOpening event.

RadDropDownList

FIXED

• The RadDropDownListArrowButtonElement.Click event was incorrectly fired when clicking with the right or middle mouse button.

RadForm

NEW

• Implemented UI Automation support.

RadGridView

FIXED

• Right-clicking a child level of the hierarchy grid header causes an unhandled exception.
• Fixed a missing GridHeaderCellElement.Sort() method.
• Adding a new worksheet to an existing workbook in a GridViewSpreadExport scenario causes corrupted output.
• Setting the EnableFiltering property to true leads to a NullReferenceException.

RadMenu

FIXED

• Using a non-existing mnemonic key would type characters into the focused input control. Introduced a new PropagateNonMnemonicKeys property to control this behavior.

RadPanel

NEW

• Implemented UI Automation support.

RadPdfViewer

FIXED

• Incorrect values are displayed in the RadDropDownListElement editor drop-down list.
• A NullReferenceException is thrown when loading a PDF file with editing controls generated by the PDF24 website.

RadPropertyGrid

FIXED

• ExpandableObject was not working correctly with multiple selected items.
• The mouse was not released when double-clicking an item and resizing the description area.

RadRibbonBar

FIXED

• Exposed the TextPrimitive property on RadRibbonBarGroup.

RadRichTextEditor

NEW

• Introduced support for raising the HyperlinkClicked event when clicking a hyperlink that points to a bookmark in the document.
• The UpdateViewPort method of the SelectionUILayer class is now virtual to support overriding.

FIXED

• Placing a bookmark and a hyperlink in a structured document tag disables the hyperlink's navigation.

RadScheduler

NEW

• Added a public property to control the status width for the AppointmentElement.

RadTextBox

FIXED

• The AccessibleName property of the text box or masked edit box was not respected by Windows Narrator.

RadTitleBar

NEW

• Implemented UI Automation support.

RadVirtualGrid

FIXED

• Columns disappeared after navigating with the left/right arrow keys when pinned columns were present.

VSB

FIXED

• Visual Style Builder threw an error for a missing VbsRecoveryData file.