怎么定义含有类的结构体？

global.h代码：
class RoomInfo
{
public:
RoomInfo()
{
m_RoomMode  = Room_NULL;
m_ForbidText = 0;
m_ForbidFlower = 0;
m_ForbidPriv = 0;
m_MaxAttend  = 20;
m_MaxPrivate = 5;
m_OrderType  = ConstTime;
m_OrderTime  = 300;
};ManagerInfo.cpp代码：
SM_ROOMINFO Info;
memset(&Info, 0, sizeof(Info));
Info.wCommand  = MET_SERVER_ROOMCHANGE;
Info.RoomInfo.RoomMode  = m_RoomInfo.m_RoomMode;
Info.RoomInfo.ForbidText = m_RoomInfo.m_ForbidText;
Info.RoomInfo.ForbidFlower = m_RoomInfo.m_ForbidFlower;
Info.RoomInfo.ForbidPriv = m_RoomInfo.m_ForbidPriv;
……
现在就缺少SM_ROOMINFO的结构体，要怎么去定义？谢谢！！