A form has been loaded that contains an event property mapped to a method with an incompatible parameter list. Parameter lists are incompatible if the number or types of parameters are not identical. 

For a list of methods declared in this form which are compatible for this event property, use the dropdown list on the Object Inspector's Events page. 

This error occurs when you manually modify a method declaration that is referenced by an event property. 

Note that it is unsafe to run this program without removing the reference or correcting the error.