I can not find the correct version of php_apc.dll for my setup
System Windows Server 2008
Compiler MSVC9 (Visual C++ 2008)
Architecture x86
PHP Extension Build API20100525,TS,VC9
PHP Version 5.4.4
Thread Safety enabled
Apache Version Apache/2.4.2 (Win32) OpenSSL/1.0.1c PHP/5.4.4
Virtual Server Yes
Server API Apache 2.4 Handler Apache Lounge
Sorry for my bad English and thanks to all
Usually the right answer is the most recent production release compatible with your installation (although normally, upgrading PHP should not be a major headache). Since APC suppport is dropped from PHP v5.5 onwards, the most recent version of APC (3.1.3) will be the right one to go for. The PECL site lists the builds compatible with your current setup.
(NB upgrading to 5.5 is a bigger jump than previous minor number upgrades due to the change to Zend opcode+optimizer)