TrnsDt

We show a typical combination of the optional parameters of TrnsDt in Combination of the TrnsDt parameters for Japanese for your convenience.
Example of TrnsDt usage from 32-bit code (source: MISCWIN.C) 

#pragma pack(2)                         /* parameter for TrnsDt will be  */
                                        /* packed along 2-byte boundary  */
struct TrnsDtParm                       /* Parameters for TrnsDt            */
{
  USHORT   Length;                      /* Length of parameters             */
  USHORT   exit;                        /* Exit code                        */
  USHORT   SourceLen;                   /* Length of a source string        */
  char * _Seg16 pSource;                /* (far) Address of a source string */
  USHORT   TargetLen;                   /* Length of a target string        */
  char * _Seg16 pTarget;                /* (far) Address of a target string */
  USHORT   id;                          /* Translation id                   */
  USHORT   SourceCP;                    /* Source code page                 */
  USHORT   TargetCP;                    /* Target code page                 */
  USHORT   Options;                     /* Translation options              */
};
#pragma pack()
extern USHORT _Far16 _Pascal TrnsDt(struct TrnsDtParm *);
#pragma seg16(Tparm)
struct TrnsDtParm Tparm;
MRESULT EXPENTRY cpConvDlgProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
{
   ...
     Tparm.Length    = sizeof(Tparm);
     Tparm.exit      = 0;
     Tparm.SourceLen = strlen(szBufIn);
     Tparm.pSource   = szBufIn;
     Tparm.TargetLen = sizeof(szBufOut);
     Tparm.pTarget   = szBufOut;
     Tparm.id = 0;
     Tparm.SourceCP = *pPcCodePage;
     Tparm.TargetCP = atoi(szCurrentHost);

     if ((*pHost).CPflag == combined)
        /*---- Options for a combined code page ------------*/
        /*         Bit 8 (on) : SO/SI in a target string    */
        /*         Bit 2 (on) : Use the IBM-defined table   */
        /*         Bit 0 (off): No SO/SI in a source string */
        /*--------------------------------------------------*/
        Tparm.Options = 0x0104;
     else
        /*---- Options for a SBCS or a DBCS code page ------*/
        /*         Bit 8 (off): No SO/SI in a target string */
        /*         Bit 2 (on) : Use the IBM-defined table   */
        /*         Bit 0 (off): No SO/SI in a source string */
        /*--------------------------------------------------*/
        Tparm.Options = 0x0004;
     TrnsDt(&Tparm);
   ...
Options of TrnsDt at Example of TrnsDt usage from 32-bit code (source: MISCWIN.C)