Create .NET Delegate

R←2016⌶Y

Windows only.

.NET methods (and properties) may specify a parameter to be a delegate. A delegate is a place holder for a function, normally with a particular signature and result type, that should be supplied when the method is called. Sometimes the signature of a .NET method that takes a delegate as a parameter does not provide enough information for Dyalog to determine automatically what type of delegate is required. 2016⌶ allows you to specify the type so that Dyalog can perform the necessary conversion(s) at run-time.

Y is a 2-element array. The first element is a .NET type that inherits from the abstract .NET Class System.Delegate. The second item is either the name of or the ⎕OR of an APL function which is to be invoked via a .NET method or property.

The result R is a ref to an instance of a .NET type specified by the first element of Y, which internally is associated with the function identified by the second element of Y.

Example

      ∇foo∇
     ∇ foo(ev arg)
[1]    ⍝ Callback for .NET method
     ∇
      ⎕USING←'System'
      del←2016⌶ EventHandler'foo'
      del
System.EventHandler

Then, when calling a .NET method that requires a Delegate of type System.Eventhandler, but whose signature is imprecise in this respect, the object del should be used instead.