Use the Legacy Code Tool to integrate a C function whose arguments are pointers to structures.
Create a mask dialog box using the Parameters & Dialog pane of the Mask Editor. When you mask a block, you encapsulate the block logic and create a custom interface for the block.
Use a masked Variant Subsystem block in a Simulink model. Click the Open Model button located on the top right corner to view the related example model. This example model references masked