IMSTRING structure.

typedef struct _IMSTRING {
  ULONG     ulsize;    /*  Size, in bytes, of this data structure. */
  HWND      hwnd;      /*  Reserved, set to NULL. */
  ULONG     ulFlag;
  BYTE      IMOut[1];  /*  Consists of the following buffers: */
} IMSTRING;

typedef   IMSTRING   * PIMSTRING ;