Essien Essien wrote:
> hiya,
>
> I have a code snippet that looks like:
>
> typedef int (*SQLITE3_CLOSE)(sqlite3*);
> typedef const char* (*SQLITE3_ERRMSG)(sqlite3*);
> typedef int (*SQLITE3_OPEN)(const char*, sqlite3**);
> typedef int (*SQLITE3_EXEC) (sqlite3*, const char*, sqlite3_callback, void*,
> char**);
>
> HINSTANCE sqlite3_dll;
>
> SQLITE3_CLOSE _sqlite3_close;
> SQLITE3_ERRMSG _sqlite3_errmsg;
> SQLITE3_OPEN _sqlite3_open;
> SQLITE3_EXEC _sqlite3_exec;
>
> int DB_Init()
> {
> sqlite3_dll = LoadLibrary("sqlite3.dll");
> if (sqlite3_dll == NULL) {
> printf("Cannot find sqlite3.dll. Make sure its in the same
> directory as the program\n");
> return 0;
> }
>
> _sqlite3_open = (SQLITE3_OPEN)GetProcAddress(sqlite3_dll,
> "sqlite3_open");
> if (_sqlite3_open == NULL) {
> printf("Cannot load function sqlite3_open");
> return 0;
> }
> }
>
> problem is, when ever i call DB_Init(), it always fails with 'Cannot load
> function sqlite3_open'. But it successfully passes the LoadLibrary portion.
> I'm not a win32 guru, so i'm willing to admit i've made a mistake somewhere.
>
> Any ideas on what i'm doing wrong?
>
> I'm using Turbo C++ 4.5 IDE and related tools. (yeah... i know turbo
> C++ 4.5is realy aged, but could this be the problem?)
>
> Essien
>
>
Since you have the borland compiler product, use the "TDUMP.EXE" tool to
view the PE header of the sqlite3.dll file. Sometimes the functions
will be exported with a leading underscore. If your compiler is
producing 32 bit binaries, and the DLL is also 32 bit, then you might
try adding a leading underscore to the symbol name when you call
'GetProcAddress'.
