BAPI for return/supplement the funds for both overall and fiscal year.

Question

I have a development requirement for following and I am new to Investment ,management and Project
Systems functionality.
Your help will be appreciated
The new transaction will use the upload data to create returns and/or supplements to Marketing budgets.  The following is what the transaction will do per request:
•     Verify funds are available to shift.  The program will do this by creating an error log for items that do not meet this criteria.  The program will process all line items that have available funds (IM52).
Q pls let me know what BAPi/FM to use to verify whether funds are vailable or not
•     Return the funds for both overall and fiscal year (IM52).
Q Pls tell me BAPI for same
•     Supplement the funds for bother overall and fiscal year (IM52).
Q BAPI for same
•     Deactivate the availability control for the WBSE’s affected (CJBW).
Q  How to do that and BAPI/FM for same
•     Activate the availability control for the WBSE’s affected (CJBV).
Q  How to do that and BAPI/FM for same
•     Add appropriate text from the data in the upload spreadsheet (this may be a concatenation of data from the columns in the upload) (IM52).
       Not clear what user is trying to say
•     The transaction needs to be able to handle whole dollars as well as numbers that might include up to two decimals:  e.g. .01 (IM52).

Answer 1

I am answering my own question since i completed the above development by using the FM KBPV_POST_DATA .
It will post to all the BP tables and is tested successfully.