1# OH_IPC_MessageOption 2<!--Kit: IPC Kit--> 3<!--Subsystem: Communication--> 4<!--Owner: @xdx19211@luodonghui0157--> 5<!--SE: @zhaopeng_gitee--> 6<!--TSE: @maxiaorong2--> 7 8## Overview 9 10Defines an IPC message. 11 12**Since**: 12 13 14**Related module**: [OHIPCRemoteOhject](capi-ohipcremoteobject.md) 15 16**Header file**: [ipc_cremote_object.h](capi-ipc-cremote-object-h.md) 17 18## Summary 19 20### Member Variables 21 22| Name| Description| 23| ---- | ---- | 24| OH_IPC_RequestMode mode | Message request mode.| 25| uint32_t timeout | Parameter reserved for RPC. It is invalid for IPC.| 26| void* reserced | Reserved parameter, which must be NULL.| 27