188.8.131.52.2 WithEvents Variable Declarations
withevents-variable-dcl = "withevents" IDENTIFIER "as" class-type-name class-type-name = defined-type-expression
A <withevents-variable-dcl> defines a variable whose declared type is the specified type of its <class-type-name element.
The specified type of the <class-type-name> element MUST be a specific class that has at least one event member.
The specified type of <class-type-name> element MUST NOT be the class defined by the class modules containing this declaration.
The name value of the <IDENTIFIER with an appended underscore character (Unicode u+005F) is an event handler name prefix for the class module containing this declaration.
The specified type of a <class-type-name> is the declared type referenced by its <defined-type-expression.