When doing more than one variable declaration makes sense to put the * correctly, or you do not get what you expect. When writing: char* a,b,c; you get the equivalent of: char *a,b,c; and you would probably expect: char *a,*b,*c;

Use a tool for codeformatting, make sure to run it before you commit your code, or make your editor format your code. Codeformatting "by hand" is waste and should be eliminated.

One options would be to allow setting a "from/start" date, and a number of months as a regular integer parameter, e.g. from a textfield or combo box. Then in your C# code create a date range as: public DateTime CalculateEndDateOfRange(DateTime startdate, uint months) { DateTime endtime = startdate.AddMonths(months); return endtime; } Check as similar question here... http://stackoverflow.com/questions/4454271/date-range-in-days-c[^]

I am sure you can find a solution for adding more producers, if you are good at lock-free algorithms. This page suggest that it is not impossible. http://www.1024cores.net/home/lock-free-algorithms/queues

Some ideas of the top of my head.. Can you interleave the input data for the function _b,_g,_r so they might fit caches better? Maybe you can unroll some of the loop, iterate in 12 bytes at a time 4 * 3, and store as 3 uint* operations... The last of the column w % 4 (i think) must be performed by your current loop (between 0 and 3 operations).