How Do I Import./ Use External Dll Into Windows Project

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Respected sir/s,

i have two dll files which are developed into VB6.0 and Delphi 7.
I want to use those dll into my windows project(VB.net 3.5)

I did following steps for that..

project --> references --> Add References --> Browse --> add selected dll

I got following error every time.

"A reference to D:\abc\test.dll could not be added. Please make sure that the file is accessible and that is valid assembly or COM "

How to use those file into my current vb.net project?

Thank you,

Posted 18-May-14 21:51pm

Sunil Bansode

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MayurDighe 19-May-14 5:55am

Can you provide the link for those DLL files...???

I will try to get it done...

Happy Programming...:-)

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S Houghtelin · Answer 1 · 2014-05-19T01:59:00

Have you registered the dlls? If they are not registered you will not able to access their functions.

I cannot speak for the Delphi libraries as I have no experience there but you should be able to access the VB6 dlls using interop.

Chapter 9 of this free book from Microsoft should help you. http://msdn.microsoft.com/en-us/vstudio/ms788236[^]

I know this is not a copy this code into your project answer, but going through the material should go a long way in providing the solution you seek and more.