Grazie delle risposte, ho trovato in rete questo:

LoadLibrary("Dllname") failed.
GetlastError returns 0x00000485 From Winerror.h, 0x00000485 = 1157 (ERROR_DLL_NOT_FOUND), which means "One of the library files needed to run this application cannot be found." For example, typing regsvr32 missing.dll returns this error message if the Missing.dll file is not found.

Ho provato con regsvr32 e su windows 98 nè ho trovati decine, ho provato ad aggiornarlo ma niente.