Method

IsEventImplemented

Description

Used to determine if a specific event has been implemented (has code) or not.

Usage

result = IsEventImplemented(eventName)

Part	Type	Description
result	Boolean	True if eventName is a valid event; False otherwise.
eventName	String	The event whose implementation state is being determined.

or

result = IsEventImplemented(obj, eventName)

Part	Type	Description
result	Boolean	True if eventName is a valid event; False otherwise.
obj	Object	Object for which it is checked whether it has implemented the specified event.
eventName	String	The event whose implementation state is being determined.

Notes

This method must be called from one of the events or methods of the same class.

It will return True whether the event was implemented by entering code directly into the event or if the event is being routed elsewhere via AddHandler.

Sample code

From the Opening event of a button subclass to determine if the Pressed event is implemented:

If IsEventImplemented("Pressed") Then
  MessageBox("The Pressed event is implemented.")
End If

If you have a regular Button on your layout, you can determine if the Pressed event is implemented that way:

If IsEventImplemented(Button1, "Pressed") Then
  MessageBox("The Pressed event is implemented.")
End If

Compatibility

Project Types	Console, Desktop, Mobile, Web
Operating Systems	iOS, Linux, macOS, Windows