Hide and activate fields in SAP Business One

Question

Hi,
How do I see the following in SAP Business one 2007 A?
1 - Where do I see the option of hiding or making a filed mandatory, optional etc.? Can i hide some fields in A/P invoice entry? How do I do that?
2 - How do I create a field or a column which will populate necessary details. For example..How do I create a column named amount in the A/P invoice so that it shows the corresponding amout of the invoice near the column named Invoice number?
3 - How to access a particular column from a table structure? Do I need to write an SQL query for this?
4 - How to pull up a field from a table and make is visible for the users? Do I need to be an ABAP expert for this?
5 - What are stored procedures?
Please let me know!! Thanks

Answer 1

3 - How to access a particular column from a table structure? Do I need to write an SQL query for this?
Try the link below:
how do make link between query and UDF
Yes, you write the query by going to Tools->Query Generator.
You need to know the FMS number for the varialbe AMOUNT you created.
You can know that by turning on debug info View->Ssystem Info, and then placing your cursor on AMOUNT. At the bottom left know its FMS variable number. There are multiple ways of dealing with.
Use the above variable in the Query Generator with a $ sign. Save the query. General (some name)
Then attach the above query to AMOUNT ShiftF2 and click to dril down to saved query and attach it. Choose the type refreshment.
I am missing out on some small details, but you have to try it you will get there.