Hi Fahad,

Thank you for posting in our forums!

This event is derived by the Windows Forms Control class and occurs when the mouse pointer enters the control boundaries. In your specific scenario the control is the UltraGrid. For further reference about what could be achieved when subscribing to this or similar events, please see the MSDN page at https://msdn.microsoft.com/en-us/library/system.windows.forms.control.mouseenter(v=vs.110).aspx

What exactly you are trying to accomplish? What makes you think that this is the right event for your purpose?

In addition, I am sending you sample application with UltraGrid subscribed to MouseEnter event handler.

Let me know if you have any additional questions.