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S>C 0x4A SID_OPTIONALWORK
Message Id:0x4A
Message Name:SID_OPTIONALWORK
Direction:Server to Client
Used By:Diablo II, Diablo II Lord of Destruction
Starcraft Broodwar, Starcraft Original
Warcraft III The Frozen Throne, Warcraft III Reign of Chaos
Format:

(STRING) MPQ Filename

Remarks

Using SID_GETFILETIME with request ID 0x80000005, the client should download this file and call the ExtraWork function inside of it. Generally, this message is used for the optional ExtraWork DLL.

The client will only execute this entirely if the registry key HKCU\Software\Battle.net\Optimize\SysDesc [REG_UINT32] is set to 1.

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