Very strange. I now see how it works. This is what I tested:

MyForm Init
DO myprog WITH ThisForm

myprog.prg:
LPARAMETER cFormWindowName

WAIT WINDOW "Window: " + cFormWindowName.name
cFormWindowName.caption = "My New Caption"


Here was the problem, I was trying to do this:
EVALUATE(cFormWindowName + ".caption = 'My New Caption'")

I didn't realize that the variable actually becomes the object.




>Pass the form reference as a parameter
>
>>Example:
>
>MyForm Init
> DO PROGRAM showformname WITH ThisForm
>
>
>
>showformname.prg:
> LPARAMETERS poForm
> WAIT WINDOW "Form Name: " + poform.name