ICalculatorExEventsUndefinedVariable Method

void UndefinedVariable(
	string variableName,
	out string value
)

Sub UndefinedVariable ( 
	variableName As String,
	<OutAttribute> ByRef value As String
)

void UndefinedVariable(
	[InAttribute] String^ variableName, 
	[OutAttribute] String^% value
)

abstract UndefinedVariable : 
        variableName : string * 
        value : string byref -> unit 

The undefined variable event can be used to provide a hook into the data model or API of another software system. If a variable is referred to in your calculations which doesn't exist then your event handler will be called and you have the opportunity to provide a value for the referenced name. Note that once a value has been provided the variable will then exist in Tedds so the undefined event will not fire again for that variable unless it is explicitly deleted.