VB6 17 Visual Basic 6 (Visual Studio 6.0), some codes may also be suitable for VBA

Functions.dll
Old DLL housing list of functions to be used and called by any application, ...
Functions.zip

WinImage.dll
An old DLL library enables reading and writing to floppy disks (and/or images) ...
WinImage.zip

Save to, Read from, Delete registry key
Save into registry, read from registry or delete a key. Accessible to only ...

DBMySQLVBA API
An API to allow connecting to MySQL database from VBA (or VB6), found it a ...
dbmysqlvbapi.zip