VA Smalltalk Virtual Machine API The VA Smalltalk Virtual Machine Application Program Interface (API) is a C language interface that binds to the VA Smalltalk virtual machine and enables you to write C code that interfaces with Smalltalk code. This chapter describes the VA Smalltalk Virtual Machine API and includes the following: • Calling functions in other languages from VA Smalltalk • Calling VA Smalltalk from other languages • Writing user primitives