sqlite3_win32_set_directory,
  sqlite3_win32_set_directory8,
  sqlite3_win32_set_directory16 —
Win32 Specific Interface
int
sqlite3_win32_set_directory(unsigned
  long type, void *zValue );
int
  
  sqlite3_win32_set_directory8(unsigned
    long type, const char *zValue);
int
  
  sqlite3_win32_set_directory16(unsigned
    long type, const void *zValue);
These interfaces are available only on Windows. The sqlite3_win32_set_directory
  interface is used to set the value associated with the sqlite3_temp_directory
  or sqlite3_data_directory variable, to zValue, depending on the value of the
  type parameter. The zValue parameter should be NULL to cause the previous
  value to be freed via sqlite3_free; a non-NULL value will be copied into
  memory obtained from sqlite3_malloc prior to being used. The
  sqlite3_win32_set_directory interface returns SQLITE_OK to indicate success,
  SQLITE_ERROR if the type is unsupported, or SQLITE_NOMEM if memory could not
  be allocated. The value of the sqlite3_data_directory variable is intended to
  act as a replacement for the current directory on the sub-platforms of Win32
  where that concept is not present, e.g. WinRT and UWP. The
  sqlite3_win32_set_directory8 and sqlite3_win32_set_directory16 interfaces
  behave exactly the same as the sqlite3_win32_set_directory interface except
  the string parameter must be UTF-8 or UTF-16, respectively.