The DSA_MSG_PREPARE_SCRIPT_REQ union defines the request messages sent to the IDL_DSAPrepareScript method.

 typedef 
 [switch_type(DWORD)] 
 union {
   [case(1)] 
     DSA_MSG_PREPARE_SCRIPT_REQ_V1 V1;
 } DSA_MSG_PREPARE_SCRIPT_REQ;

V1: The version 1 request.