Copy rows from one worksheet to another based on satisfying criteria using VBA

Hello,

I am having problems writing a code to copy the rows from one worksheet to another, if certain criteria are met.

A data dump is taken from a report and copied into worksheet "a" (starting at C5 due to column headings etc), then in worksheet "b" I need to, on the pressing of a command button, delete the current data in worksheet "b" (C5:Z21000), and pull through data from worksheet "a" (C5:Z21000) if the code number in Column P ends with a ".99" (example code: AB.CD.01.99) and if Column S is NOT populated.

The reason for the deleting of data first is that the only the current/live ".99" rows need to be copied through, and if Column S is populated or the code number has changed, then the actions against the rows have been completed.

It is not essential, but would be super helpful if the code could only bring through Columns CDEFGHIPQRST and put them in CDEFGHIJKLMN.

Many thanks in advance.

alisun125