I have code snippets, VBA / Excel, and have no idea how to submit them for member review.
When you go to the page to create a new thread (https://www.daniweb.com/community/contribute/4) it says at the top "You are starting a Discussion Thread. Need to do something else instead?" If you click that link you can change it to contributing a Code Snippet.
If this feature is not yet available to you, it's because you need to have a couple more posts under your belt before we allow the feature. I forget how many, but the threshold isn't very high. We used to have constant problems with newbies posting their homework assignments as code snippets, which is the reason we made the threshold.