How to display port names in S-Function block just like they show up for Simulink subsystems?

When we use input/output ports with Simulink Subsystems, their names (assigned inside the subsystem) appear outside the subsystem block. Similar is the case with MATLAB Function. I want the same functionality for the ports of blocks defined as Level-2 Matlab S-Functions. Any way for this?

Answer 1

[Kaustubha Govind]

You can create a Mask on top of the block and create your own icon and port labels. Right click on the block and select Mask>Create Mask. In the "Icon Drawing Commands" box enter commands like:

port_label('input', 1, 'input1');
port_label('output', 1, 'output1');

[Muhammad Ahmed]

Thanks a lot. Although my MATLAB R2011a had a little bit different wording in menues, it was all obvious...

[Benny Espedido]

How do you make the labels appear on every instance use of s function

[sangamesh kotagi]

How do we use these commands from the S-Function c code to draw them at every instance the S-function is used?