struct _PORT_MESSAGE// Size=0x18
{
    union _unnamed_396 u1;// Offset=0x0 Size=0x4
    union _unnamed_398 u2;// Offset=0x4 Size=0x4
    struct _CLIENT_ID ClientId;// Offset=0x8 Size=0x8
    float DoNotUseThisField;// Offset=0x8 Size=0x8
    unsigned long MessageId;// Offset=0x10 Size=0x4
    unsigned long ClientViewSize;// Offset=0x14 Size=0x4
    unsigned long CallbackId;// Offset=0x14 Size=0x4
};