matlab app designer: valuechanged vs valuechanging callbacks?

Hi,

In app designer, when I define callbacks, I get two options: vlauechanged and valuechanging callbacks. what's the difference between the two?

Thanks

[Geoff Hayes]

Abdelrahman - please see https://www.mathworks.com/matlabcentral/answers/458098-difference-between-valuechangedfcn-valuechangingfcn which is near identical to your question.

[Abdelrahman Taha]

Thank you for your help.