Hello Jason,
Thank you for your report.
The WindowsFormsHost control have a
different mouse events life cycle than standard winforms application (some mouse leave, enter and wheel events are not fired) and we cannot change this behavior. As a workaround I can suggest to change the TextBox border only in case that TextBox contains focus instead of hot tracking.
I hope this will applicable for you application because we are not able to provide solution for this.
Regards,
Peter
Telerik
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