I am trying to understand a DLL. I am new to IDA disassembler. I came across this instruction. What does the following instruction mean ? I saw this in IDA 5.0 Freeware.
retn 4
retn in is an Assembly instruction "return near" as opposed to retf = return far. According to https://courses.engr.illinois.edu/ECE390/archive/fall2001/books/labmanual/inst-ref-ret.html retn X instruction is return + move the stack pointer X more bytes. This is typcially used by methods with calling conventions where callee is responsible for removing passed arguments from the stack such as __stdcall.