Release History

Telerik UI for WinForms 2026.1.210 (2026 Q1)

February 11, 2026

What's new

NEW

• Introducing a new control: Speech-to-Text button

Common

Dependencies

• Telerik Document Processing Library (DPL) version is updated to 2026.1.210
• Minimum required Telerik Licensing version updated to 1.6.40

New Controls

NEW

• Speech-to-Text button.

RadMap

NEW

• Add support of transparent images.

RadPictureBox

NEW

• Added file path and image type information to the ImageLoaded event.

RadRichTextEditor

FIXED

• Current editing style is not preserved when the document layout is refreshed.
• Exception when pasting with 'Keep Source Formatting' if a style is missing from the document's style repository.
• Exceptions occur when loading documents containing element tags without direct content that use opening and closing tags instead of self-closing tags.
• Custom annotations are not rendered correctly when they have no content and are right-aligned.
• Importing HTML that contains an image with an align attribute does not apply the alignment to the created image element in the document model.
• Exporting documents (RadDocument) to .docx format produces an invalid file.

RadSpinEditor

FIXED

• When the NullableValue property is bound, the NullableValueChanged event is triggered even when the same value is applied.

RadSpreadsheet

FIXED

• Cannot unselect cells with the Ctrl key.

RadStepProgressBar

NEW

• Add StepClicked event to the control.