This helps with one of my greatest peeves, that of writing too much code on one line. In the age of huge monitors and people that use freakishly small fonts the line length of code can quickly become unreadable for many users.
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Column Guides in Visual Studio
A lot of coding guidelines specify the maximum length for a line of code. For instance in the CLR, Microsoft like to keep lines of code under 110 characters long. Visual Studio has a feature which lets you display a vertical line at the column of your choosing to help visually see when a line is getting too long. This does involve mucking in the registry so the usual disclaimers apply.
To enable this feature, set:
[HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\8.0\Text Editor]
"Guides"="RGB(192,192,192) 110"
The values passed to the RGB function let you specify the color of the line, and the number following tells Visual Studio at what column to display it. The