Retail POS: How to save a new customer field in AX and store DB

Hi,

I would like to save the value of the new customer field in AX and the store DB. In New Customer form, i added my new field "Customer Date of Birth "

In frmNewCustomer.Designer.cs, i added the code for binding the field:

this.textBoxBirthDate.DataBindings.Add(new System.Windows.Forms.Binding("DateTime", this.bindingSource, "BirthDate", true));

And in CustomerViewModel.cs, i added the class for extend the Customer.

Now, only i need to the save birthDate value in AX and Store DB .

In saveCustomer method , I did not find how  to save value in DB and Ax.