Anytime
Some other useful posts I've used(Bookmarked!) as resources include:
TDK's Tutorial List
-This list of tutorials covers the commands with a great level of detail, as well as including reasonable examples of how you would use said commands.
-I find myself returning to this page again and again as I play with new ideas
Dark Basic Code Corner
-Take this one with a grain of salt, as I haven't yet delved into the site that much(I'm still in the process of learning DarkBASIC, myself). At first glance, it seems like a site with strong info, so I'm including it as a resource.
My own sliding collision system
-After an extended period of pulling my hair out trying to figure out a simple-yet-competent collision system, this is what I came up with. There are other popular collision systems you can use, but mine is very quick & easy to implement.
-I only include this because it was a memorable roadblock on my journey to making projects act the way I wanted them to, and I couldn't find much help on the subject anywhere.
Ask not for whom the bell tolls;
It tolls for ye!