# c++ Event Nodes **URL:** \ **Category:** C++\ **Tags:** unreal-engine\ **Created:** [April 14, 2017, 12:03pm UTC](https://forums.unrealengine.com/t/c-event-nodes/89923 "2017-04-14T12:03:06Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![BrUnO\_XaVIeR](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bruno_xavier/32/1110230_2.png) [@BrUnO\_XaVIeR](https://forums.unrealengine.com/u/BrUnO_XaVIeR)\ **Post date:** [April 18, 2017, 3:10pm UTC](https://forums.unrealengine.com/t/c-event-nodes/89923/12 "2017-04-18T15:10:56Z")
You want to execute an event inside any unknown Blueprint class from your DLL callback; That means you want to call a Blueprint Interface function from the callback; you won’t be able to auto bind C++ delegates like that, also the Blueprint user must implement the interface and drop the “red node” event function from the interface to be able to use it. Calling Blueprint implemented Interfaces from C++ is a little tricky, here I’ve added some example; In last example code, the “red node” event is fired from C++ BeginPlay(): > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — ue4community.wiki! You will be able to find content from the official... There’s some more datails about the Blueprint side of things here: > **[UFSM: Finite State Machine](https://forums.unrealengine.com/showthread.php?116032-UFSM-Finite-State-Machine&p=695822&viewfull=1#post695822)** > > Hello! 🙂 I’ve developed a Plugin module which adds to the UE4 environment a bunch of functionality regarding FSMs, so then I could stop trying to address a bazillion ‘If Then Elses’ everywhere. I haven’t published this yet, but as always, I... --- _[View the full topic](https://forums.unrealengine.com/t/c-event-nodes/89923)._