A method and system for routing a function call to a core dynamic link library (DLL) via a pass-through DLL. An indication that an application requires a specific functionality is received. Using the indication, an initialization function internal to the pass-through DLL identifies a core DLL as providing the specific functionality. The core DLL is loaded into a memory. The pass-through DLL calls an internal processing initialization function included in the core DLL. The pass-through DLL receives and stores an address of a list of pointers that reference a set of functions included in the core DLL. The pass-through DLL receives a function call to a first function in the set of functions. The pass-through DLL calls the first function by utilizing the address of the list of pointers to identify a pointer that references the first function in the set of functions.