Welcome to the WinForms feedback portal. We’re happy you’re here! If you have feedback on how to improve the WinForms, we’d love to hear it!

  • Check out the features or bugs others have reported and vote on your favorites. Feedback will be prioritized based on popularity.
  • If you have feedback that’s not listed yet, submit your own.

Thanks for joining our community and helping improve Syncfusion products!


When a TrackBarEx is added to ToolStripTabItem and any other ToolStripItem which has SuperToolTip added is hovered, cast exception is throwing.

Call stack details:



Message=Unable to cast object of type 'Syncfusion.Windows.Forms.Tools.TrackBarEx' to type 'Syncfusion.Windows.Forms.Tools.ToolStripEx'.



at Syncfusion.Windows.Forms.Tools.ToolTipControl.OnPopup(Component component, Message& m)

at Syncfusion.Windows.Forms.Tools.ToolStripItemsToolTipService.OnNotify(Message& m, ToolStripData tsData)

at Syncfusion.Windows.Forms.Tools.ToolStripItemsToolTipService.ToolStripData.Syncfusion.Windows.Forms.Tools.INativeMessageFilter.ProcessMessage(Message& m)

at Syncfusion.Windows.Forms.Tools.NativeMessageHandler.CallWndProc(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at Syncfusion.Windows.Forms.Tools.NativeMessageHandler.WndProc(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Replication Steps:

1.Run the sample.

2.Hover the DropDownButton in Ribbon.

3.Cast Exception is thrown.