ACC: How to Declare C++ Functions Called from Access Basic

ID: Q109338

The information in this article applies to:

Microsoft Access versions 1.0, 1.1, 2.0

SUMMARY

Advanced: Requires expert coding, interoperability, and multiuser skills.

The following steps describe how to call C++ dynamic-link library (DLL) functions in Access Basic:

Make sure to define the functions within your C++ code with the "extern" declaration. The following example demonstrates the syntax for the extern declaration:

extern "C" {return type} FAR PASCAL __export {function name} ({parameters})
An example of an actual declaration in your C++ code might look like:

extern "C" int FAR PASCAL __export my_func ()
To call the sample function above you would define the Declare statement as follows:
```
      Declare Function my_func Lib "MYLIB.DLL" () As Integer 
```

Make sure that the declaration is not set for case-sensitive exports.

REFERENCES

For more information about calling DLLs, search on "declare external procedures" using the Microsoft Access Help menu.

Additional query words: programming


Keywords          : kbprg 
Version           : 1.0 1.1 2.0
Platform          : WINDOWS 
Issue type        : kbhowto

Last Reviewed: March 29, 1999