recording mouse click input

Good morning. I'm new to matlab, I'm doing a project where the user has a menu with few buttons (see pic). As you can imagine, every button pressed will play a musical note. I need to build an array to store (in order) the buttons that the user press (let's say max 15 buttons, then 15 elements in the array) and then play them. I'm really lost. Can anyone help me? Thanks, B.

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[Geoff Hayes]

Each button (on your GUI) can have a callback function associated with it. That way, when the user presses the button, the callback fires and the code can play the correct sound (either directly in that function, or within one that is shared by all 15 buttons). See button callback example for details.