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Event handler is invalid

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The parameter list of an event-handling procedure must precisely match the declaration of the event. This error has the following cause and solution:

  • Your event-handling procedure has the wrong number of parameters. Eliminate extra parameters or add the missing ones.

  • One or more of your event-handling procedure parameters has the wrong data type.

    Make the parameter types match those of the event declaration.

  • Your event-handling procedure is a Function rather than a Sub. Make your procedure a Sub. An event handler can't return a value.

  • Another type library uses the event name for a type of its own.

    Qualify the name with the name of the proper type library to avoid the ambiguity.

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