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Creating And Consuming Custom Control Events In Windows Forms C#

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In my autocomplete textbox control, I have a listbox that shows the suggested items based on user input. However, as a requirement I want to create an event that will trigger once a selection has been done in the listbox and this event will be consumed in the calling program (Main Form). To do that, you must define a custom event. After googling for a while, here are the references that made me accomplish the task:
Creating Custom Events in C#
Quick and Easy Custom Events
Cheers!

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