Using Function Pointers/Dynamic Functions

Question:
In Access 2.0 there is an Eval() function which will automatically evaluate numeric expressions. This functionality does not appear to exist in VB 4. I found an article in the MS Knowledge base (Q86688) which leads me to believe that the functionality was intentionally left out. The goal is to be able to store user-defined functions in a table and fire them based on user input. Is this possible and if so, how.

Answer:
Function pointers, essentially what you are describing, are not supported under Visual Basic. You can’t store a procedure name in the database and tell Visual Basic to dynamically run it. However, you could create a procedure that interpreted a code from the database and then run a particular piece of code based on that code. That’s about as close as you can get. You could also make separate executables for each different piece of code you might want to run, but that’s even worse and more complicated.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS