I need to drop EventCode 4634 and 4624 with Login_type 3, how i can use nullqueue option and write the correct REGEX on transforms.conf .
Let's assume your sourcetype is called WindowsEventSourcetype, then you will want to add some lines to that sourcetype's definition in props.conf and transforms.conf:
props.conf
[WindowsEventSourcetype] TRANSFORMS-t1=eliminate-4624-4634-3
transforms.conf
[eliminate-4624-4634-3] REGEX=(?m)EventCode\s*=\s*(4624|4634).*?Type\s*=\s*3\s DEST_KEY=queue FORMAT=nullQueue
A couple things to note: