Sylvain,

I haven't read the whole thread, only this message, but I agree that only C option is a valid one. With A & B you're creating circlic references problem and you would not be able to release the form.

>The properties of the form are not visible to the biz class unless you make them visible. You can either:
>
>A) Pass the THISFORM pointer to the biz class:

*-- In the form Init:
>THIS.oBiz = NEWOBJECT ("MyBiz", "MyBiz")
>THIS.oBiz.oParent = THISFORM    && Assume that the biz class have a public property called oParent
>
>*-- In the biz class:
>THIS.My_Property = THIS.oParent.My_Property    && The form My_Property must be public

B) Pass the property to the biz class if it's read-only:

*-- In the form Init:
>THIS.oBiz = NEWOBJECT ("MyBiz", "MyBiz")
>THIS.oBiz.My_Property = THISFORM.My_Property    && The biz class My_Property must be public

C) Pass a parameter object to the biz class:

*-- In the form Init:
>THIS.oBiz = NEWOBJECT ("MyBiz", "MyBiz")
>loParam = NEWOBJECT ("MyParam", "MyParam")
>loParam.My_Property = THISFORM.My_Property    && The parameter class have a public property called My_Property
>THIS.oBiz.oParam = loParam    && Assume that the biz class have a public property called oParam
>
>*-- In the biz class:
>THIS.My_Property = THIS.oParam.My_Property

I prefer option C if you have many parameters to pass because everything is encapsulated inside one class. If you only have one parameter to pass and it's read-only, option B is good. Option A is the quick and dirty way to pass information, but it can also cause circular references and side effects if your not carefull.
>
>>I think what you are saying makes sense, very logical. But something does not work.
>>
>>Here is how I test this:
>>
>>I have the following line in a method of the BIZ class:
>>
>>

>>this.my_property = thisform.my_property
>>

>>
>>But I get error "Object is not contained in a Form." So it looks like even though I instantiate BIZ in the INIT method of the UI FORM and reference it to a property of the UI form, "thisform" cannot be references from BIZ class. What am I missing?