"Undefined reference" error - need a pointer or two

if you could pastebin the code that the error is originating IE Password.c/h etc etc and what line it is found in

I used Visual Studio Express myself so I can't help with this problem. I don't recall needing a library though? I included all the needed stuff in Other\Source, IIRC.

as I mentioned in the other tread, you got to convert the string into utf-8 and pass it as SQLite::SQLite(char const*, int, char const*) instead of wchar_t.

See the comment in 'sqlite3.c' :

Note to Windows users: The encoding used for the filename argument
** of sqlite3_open() and sqlite3_open_v2() must be UTF-8, not whatever
** codepage is currently defined. Filenames containing international
** characters must be converted to UTF-8 prior to passing them into
** sqlite3_open() or sqlite3_open_v2().

I'm a bit confused about the 'const TCHAR*' in 'SQLite::SQLite()':

SQLite::SQLite(const TCHAR* filename, int flags, const TCHAR* zVfs) {
  handle = 0;
  int ret;
  if ((ret = sqlite3_open_v2(filename, &handle, flags, zVfs)) != SQLITE_OK || !handle) {
	Close();
	throw ret;
  }
}

but see the declaration of sqlite3_open_v2():

SQLITE_API int sqlite3_open_v2(
  const char *filename,   /* Database filename (UTF-8) */
  sqlite3 **ppDb,         /* OUT: SQLite db handle */
  int flags,              /* Flags */
  const char *zVfs        /* Name of VFS module to use */
);

If I could meet you in IRC, maybe you could help me to compile this in MinGW. I can't seem to set it up right. I'm getting:

error: `SecureZeroMemory' was not declared in this scope

..and then see if we could work it out together

edit: Ok, got it to compile (try including 'sqlite.cpp' into your project), but lots of warnings with MinGW !
Anyway I think your best bet would be to use the ChromeP password plug-in (rename it if you'd like), plus use CallANSIPlugin.nsh (which is also included in PAL 2.1 beta) plus something like this header file. This way you would use the already proven plug-in and pass it the utf-8 strings like sqlite needs.
Disclaimer: I haven't tested any of this.