The osrs_opei script is used by the Open Source Rule Set to handle the OnPlayerEquipItem event. The content of the script is the following.
///////////////////////////////////////////////////////////////////////////// // // file: // osrs_opei // // purpose: // OnPlayerEquipItem event script. // ///////////////////////////////////////////////////////////////////////////// // the include file for Open Source Rule Set events #include "osrs_inc" ///////////////////////////////////////////////////////////////////////////// void main() { // determine what type of object is calling this script int iCallingClass = osrs_GetCallerEventClass(OBJECT_SELF); switch(iCallingClass) { //////////////////////////////////////// module case I_OSRS_EVENT_CLASS_MODULE: // Module::OnPlayerEquipItem Pre-event if (!osrs_mo_opei_pre()) { return; } // Module::OnPlayerEquipItem event if (!osrs_mo_opei()) { return; } // Module::OnPlayerEquipItem post-event osrs_mo_opei_post(); break; } }