Please Help Me to Modify This Code

hi,
i added a stock item named "4 OL BC" to the gate way of tally for easy accessible and set the current month for report with day wise report
code is here

Code:

[#Menu : Gateway of Tally]

Add : Item : 4 OL BC : Display :  All Stock ItemsS : NOT $$IsEmpty:$$SelectedCmps

[Report: All Stock ItemsS]

Use : Item Monthly Summary
Set : Stock Item Name : "4 OL BC"
Set      : SVFromDate          : $$MonthStart:##SVCurrentDate
Set      : SVToDate            : $$MonthEnd:##SVCurrentDate

now i want to add a button to the Report of Item monthly Summary's toolbar
to view the previous whole months report
for example this the current month report of stock item "4 OL BC"

now when i press the button then show the previous month report like below


I want to create a button to see the report of the previous month

Code:

[#Report : item monthly Summary]
Local    : Form : Default : Add : Button : ShowOnlyAbovesid
[Button         : ShowOnlyAbovesid
    Key         : F8
Title     : ShowOnlyAbovesid
Action     : Set      : SVFromDate          : $$MonthStart:##SVCurrentDate -31
Action     : Set      : SVFromDate          : $$MonthStart:##SVCurrentDate -31

so please help to create a button on report of item monthly summary of previous month

hope some one will help

 

the function $$MonthStart gives the date as 01-Month-year.
it is not at all necessary that -31 will always give the previous month's date. as it may contain 28/29/30 days even depending on month. therefore, if you give following a try, it may help...

Code:

$$MonthStart:($$MonthStart:##SVCurrentDate -1)

Hope this helps...

 

Hope this works for you...

[#Report : item monthly Summary]
Local : Form : Default : Add : Button : ShowOnlyAbovesid
[Button : ShowOnlyAbovesid
Key : F8
Title : ShowOnlyAbovesid
Action : Call : ChgPrevMonth
[Function : ChgPrevMonth]
01 : Action : Set : SVFromDate : $$MonthStart:$$PrevMonth:##SVFromDate
02 : Action : Set : SVToDate : $$MonthEnd:$$PrevMonth:##SVFromDate

 

thanks sir