Dear All,
Though we all must have done a lot of playing around with CRM but I am sure that a lot of us would find this as a tricky one. We know that CRM Web-UI framework at the back-end is actually a repetitive, Remote call framework to CRM APIs and SICFs.
Now I have a requirement to create a sales order for example; I shall provide custom screens on HTML or UI5 and I have to provide a similar experience to user where in the user will add values to fields on the screen and press enter etc. Hence I will initially REMOTELY( Through custom RFC ) call CRM_ORDER_MAINTAIN and create a blank sales order( as done on crm ui framework ) and then on each subsequent enter I want to call CRM_ORDER_MAINTAIN FM with the guid I already have from first call.
I will call ORDER_SAVE in the end only, to prevent wastage of memory. Also I want to avoid generating new GUIDS at each enter or round trip, hence want to continue with the guid/buffer values of the first call till the save.
My doubt is in case I remotely call CRM_ORDER_MAINTAIN the second time with the GUID I got in the first call, will the system still have all those buffered values( order_header / guid ) of the first call in the second call or simply saying : will CRM_ORDER_MAINTAIN work in this case even if I pass the guid in subsequent calls?
P.S : Please don't provide alternate solutions of saving on each enter / new guid generation on each enter. 
/Hasan