>Does not work for my problem.

Yes, you have a different problem.

Just an idea - if the whole trouble comes from the textboxes being unbound, maybe you can visit each by a decorator object, and assign them a form's property as controlsource:

lParameter oTextbox
with oTextBox
   cProperty="cs"+.name
   thisform.addproperty(cProperty, 0)
   .controlsource="thisform."+cProperty
endwith

Of course, doesn't need to be a decorator object, you can have this as a method on the form, and use this instead of the code where you assign values to the textboxes. You could use the value as a second parameter instead of the zero I used here. And if you have multiple containership levels, so your textbox names may repeat, you can use sys(2015) instead of .name for the cProperty.