I need answers for the following questions

Question

How many maximum number of fields can be there in a table?
How many primary keys can be there in a table?
What are the ways to find out the tables used in the program?
Can you have two detail lists from the basic list at the same time?
If yes how and if no why?
What are the ways to find out the tables used in the program?
whre you will use dailog programming?
whre you will use module pool  programming?
what z custom container?
whre you will be using ale/idocs?
n what r the objects u did in ale /idocs?
how to set title bar?
can we keep a tab strip in a tab strip?
how?

Answer 1

->>>at most 16 primary keys can b there in a table
->>>use SQL trace ST05 transaction to see tables used in a prg
->>>to set title bar use set title bar
SET TITLEBAR f.
Extras:
1. ... OF PROGRAM prog
2. ... WITH g1 g2 ... gn
Effect
Sets the title of a window.
You create these program-specific titles using the Menu Painter. If there is a text for title ID f, this is displayed in the title bar of the window, starting from the next time the screen changes.
The return value SY-SUBRC shows whether the system found an entry.
SY-SUBRC = 0:
Entry found
SY-SUBRC = 4:
Entry not found
If the statement occurs in an external subroutine, the system sets a title for the main program that called it. However, in a function module, the system sets a title for the fucntion group (but see also the addition OF PROGRAM ...).
Once you have set a title, it remains active within the transaction until the next SET TITLEBAR statement.
After SET TITLEBAR, the field SY-TITLE contains the current title.
SY-TITLE is 70 characters long. Longer titles are not permitted.
Notes
The contents of field f are converted into a value of type C with length 20 (according to the standard conversion rules). The system uses this value to search for the required title. You should therefore use a field with type C, to avoid unnecessary conversions. For example, the system would derive the key ' 9 ' from a type I field with value '9'.
You can use a namespace prefix with titles.
Addition 1
... OF PROGRAM prog
Effect
The system does not search in the GUI of the main program of the current program group for f, but in the program specified in the field prog.
Example
DATA PROG LIKE SY-REPID.
PROG = 'TESTPROG'.
SET TITLEBAR 'ABC' OF PROGRAM PROG.
This example sets the title 'ABC'for program 'TESTPROG'.
Addition 2
... WITH g1 g2 ... gn
Effect
The WITH addition allows you to use up to 9 parameters in the title. You address these in the title as variables &1 to &9. Additionally, any single & characters are replaced from left to right with the contents of the corresponding parameter (the first ampersand with the first parameter following WITH, and so on). If you want to put an ampersand as a character in your title, you must double it (&& is output as &).
If a parameter is missing, its corresponding variable is replaced by a space.
Given the maximum length of 70 characters (length of SY-TITLE), it is possible that your title can be truncated if you use WITH.
Example
DATA: PAR1(4) VALUE 'par1',
      PAR2(4) VALUE 'par2'.
SET TITLEBAR 'ABC' WITH PAR1 PAR2 'par3'.
Given a title "ABC" as follows:
"Title & &1&3 some_text & &2 && & &4",
the example would produce a title bar like this:
"Title par1 par1par3 some_text par2 par2 & par3  ".
Note
You can combine both of these additions. Note, then, that the ... OF PROGRAM addition must come before WITH.
->> module pool program & dialog programs r one & the same
chk this thread same question was answered
<b>/thread/157983 [original link is broken]
->>>go thru this link to know ALE/IDOCS
<b>ALE and IDOCs</b>
->>>> chkout this link for <b>aLV custom container</b>
<b>ALV List and Custom Container</b>