About Interop Multilanguage DLL

Good Morning,

I intend to make a Interop Multilanguage DLL using vb.net, to work with dephi and java.

my dll makes connection with SQL server and save data to a DB.

my question is if it's possible to use SQL SERVER with Java or delphi through my dll without make any other implementation on these languages. and which limitations I have to my dll work in other languages.

thanks for the answers