====== SetSkyBoxAttr ======


  * Parameters & Types:
    * time: number of game hours
    * itype: number parameter type (SKYBOXATTR) SKYBOXATTR
    * value: number parameter value (0~100)
  * Return value and type:
     * code:number succeeded (ErrorCode.OK) ErrorCode
  * The main purpose of this method is to set the skybox property parameters
  * Specific use cases are as follows:

<code>
local code  = World:SetSkyBoxAttr(time, itype, value)
if code == ErrorCode.OK then
    print('Execution Successful'  )
else
    print('Execution failed')
end
</code>