Passing Text box values

Could someone tell me please how I could pass the value of a text box, which I have added to my custom form in Application Studio, to a Method Parameter Field Value of a erp-function widget as shown below in the screen shot?

Many thanks

Review the help this is documented. As a pointer though, you assign an binding to the text box. Say
POHeader.MyNewDate then you can reference this to pass though as a parameter. The name of the field on the client side does not need to be backed by the database. If you want it to persist, add a UD field to the table to hold the date and you can do more with it. Hope that helps.

Thanks, I will give that a try.

Kind regards