Sending multiple data from GUI to Simulink using Arduino?

Hello, I have three edit text in my GUI. When I press a button, I want to send these three values entered in edit text as follows.

fprintf(arduino,'%3d',data1,data2,data3);

Then I want to take the sent data package from Simulink and use it by parsing.

I - How can I send multiple data?

II - How can I parse the data package that comes to Simulink?