Sure it's a snap to create Line and Shape controls of your own. But ever since I left Visual Basic 6.0, for the greener pastures of .NET I missed having the Line and Shape controls out of the box.
Back by popular demand, we have the Line and Shape controls included in the Microsoft Visual Basic 2005 Power Packs 2.0.
Please remember, these can be used in C# applications as well.
The new and improved shape controls now come with a full set of events, and a decent feature set of their own including most basic features users will need.
You can download them from here.
Will this be the end of the 1 pixel tall panel being used as a horizontal line ruler? 
I don't know, only time will tell.