Method selection in an external language based on output parameters

A method and apparatus, including a computer program apparatus, which facilitate invoking methods defined within a second language system from a first language system. When a method is invoked from the first language system, the techniques automatically compare the output parameters of the first language system method with the number and data-types of parameters output by methods defined within the second language system. Based on this comparison, the invention selects a method that best matches the output signature of the invoked method. The invention, therefore, allows a user to easily invoke methods from external objects, such as C# objects, directly from the first language system.