crystal reports programming problem

experts,

I'm trying to create a running balance of an account on a crystal report. I have the ending balance, and all of the transactions in a given period, but I need a little help in how to calculate the historic balance, given the current balance and adding or subtracting the historic transactions.

For example, if my ending balance was 100 dollars, and i had 10 deposits of 10 dollars over a given period, the data would look like this:

Date                  Balance      Amount      Tran type
2/28/2003      100      10      Credit
2/27/2003      90      10      Credit
2/26/2003      80      10      Credit
2/25/2003      70      10      Credit
2/24/2003      60      10      Credit
2/23/2003      50      10      Credit
2/22/2003      40      10      Credit
2/21/2003      30      10      Credit
2/20/2003      20      10      Credit
2/19/2003      10      10      Credit
2/18/2003      0      0      open acct

I've got the 100 dollar amount, and need to subtract it to get to 90 dollars and so on. I'm sure this is possible, but just don't know how to get to it.

thanks in advance for the help.
telliot79Asked:
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Ess KayEntrapenuerCommented:
i would use a shared variable in crystal

add the variable to the details to be

 variable = variable - deposit




http://www.ehow.com/how_5287432_use-shared-variable-crystal-report.html
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Ess KayEntrapenuerCommented:
you have to create 3 formulas.

F1.  declare shared variable  (use declaration from link above -   place in start of report)
F2.   variable = customer.starting_balance (place into group header of customer. set to balance)
F3.   variable = variable - deposits  (place in details)
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telliot79Author Commented:
can you provide a little more detail please? i'm not sure what i'm setting the shared variable to.

thanks for the prompt responses.
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telliot79Author Commented:
here's what I have:
F1: Shared NumberVar variable; - in page header
F2:  Shared NumberVar variable;
       variable:={Command.cur_bal} - in group header
F3: Shared NumberVar variable;
      variable-{Command.AMT}; - in detail

i'm getting some strange results that don't make sense. can you see what i'm doing wrong?
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telliot79Author Commented:
figured it out, had F3 wrong. got it now. thanks for the help and quick responses.
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telliot79Author Commented:
mahahaaaagicaaaaal
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mlmccCommented:
No need for shared variables.  Thise are intended for sharing with a subreport.  Use Global variables.

mlmcc
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Ess KayEntrapenuerCommented:
Very true, but both will work

-- SK Bow 2 D
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