STO - Purchase order, Delivery and Invoice

Hi Team,

Need your help!

1, How to Create Purchase Order to Test the data after ABAP Developed A Program.

2, How to take Purchase organisation and Purchase group using Tables.

3, How to take Vendor details using Sales Area and how to run tables.

4, Once we create Purchase order, How to create outbound delivery and STO invoice.

Could you please brief on this. Since i need to test the data.

Regards,

Lithu.