About Messages and Message Queues

Here are some information for dotnet developers:

Application.Run internally maintains the message/event loop
Control.BeginInvoke is similar to PostMessage
Control.Invoke , though internally implemented using PostMessage, will wait for the execution to complete like SendMessage
WinFormSynchronizationContext or WPF Dispatcher should be used instead of Control.BeginInvoke/Invoke, because the Control might be already disposed when you call its BeginInvoke in another thread, whereas the SynchronizationContext maintains its own control that has a longer life time scope.
Application.DoEvents: https://msdn.microsoft.com/en-us/library/system.windows.forms.application.doevents.aspx the example in this document explains quite well the scenario it can, but not necessary, be used.

All the above (except the Application.Run) are signs of bad design, I post them here just to help you understand the existing code.

NodeJS Event Loop