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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Oct 1, 1996



Application Security Testing: An Integral Part of DevOps

Declaring DLL Functions

A colleague wants to create a DLL using Borland C++ to call from Visual Basic 3.0 but she keeps getting an error message "Sub or Function Not Defined". Do you know of any "in-depth" references to consult on creation of DLL's?

The DLL has probably been created ok...you just need to declare the function at the top of the form you're using it in, or in a .BAS module. Take a look at the Programmers' Guide...it has information about using DLL functions. The other possibility is that your friend did not make the Sub or Function in the DLL public.

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