If I understand the question correctly, I think you can easily solve your problem by using a Form Formula in the view that specifies which form will be used when opening documents from the view. Open the view in the Designer client and find the Form Formula. Add a formula the returns the name of the form that should be used. In your case, this could be as simple as "Form_A" if you always want every document in your view to open with Form_A. Alternatively, if you always want to display these documents with Form_A, set the Form field in your LotusScript to "Form_A".
This was first published in May 2002