DTP level Routine

Hi All,

I have requirement where I have to write DTP level routine to pull data based upon the parameter values (high and low) in the TVARVC table.

For example, for 0calmonth field I will give low and high values and the DTP while executing need to consider that low and high and pull the data.

Also, I need in the same logic if I pass empty value it has to give current month based upon sy-datum.

Any help is appreciated.

Thanks