Knowledge Management

Question:
SAP version is 4.6C.
If I understand it right, SAP provides a facility to invoke SAP functions using BAPI and a COM/COM+ component in an Windows Server environment. Using BAPI we can get the necessary information for specific business functions in a company's SAP system. The three sets of information that we need are the following;
1) PRODUCT INFORMATION that basically provides the product description and at the same time query the Inventory of that product (both for "unrestricted stocks" and "consignment stocks") the key will be the product number.
2) SALES ORDER INFORMATION that basically provides the status of a particular sales order and for which customer, if necessary additional information on the status of the SO will be provided like Sales Invoice # if the status is already "Billed" or Deliver Number if the status is "Picked", etc. The key will be the Sales Order Number.
3) SALES ORDER INFORMATION by CUSTOMER that basically provides the last n Sales Orders of the customer from a particular date range. The information will be similar to #2 only the key will be the customer number.
I just want to find out how hard it will be to put the application together. I can go direct to the databases but I'd rather pass through the BAPI interfaces.
Thanks!
Answer:
Try to find in SAP whether there are BAPI Method for all information you needed, if yes, it is to get them outsife from SAP, such as VB project or so.
Answer:
Try transaction BAPI to view the available BAPI objects and their functionality
_________________
The best is yet to come !!