Drag the files / folders from Windows Explorer into the Solution Explorer. It will add them all. Note this doesn't work if Visual Studio is in Administrator Mode, because Windows Explorer is a User Mode process.
This is originally from Sara's blog.
It also works with almost any version of Visual Studio, you just need to change the "8.0" in the registry key to the appropriate version number for your version of Visual Studio.
The guide line shows up in the Output window too. (Visual Studio 2010 corrects this, and the line only shows up in the code editor window.)
You can also have the guide in multiple columns by listing more than one number after the color specifier:
RGB(230,230,230), 4, 80
Puts a white line at column 4 and column 80. This should be the value of a string value
Guides in "Text Editor" key (see bellow).
Be sure to pick a line color that will be visisble on your background. This color won't show up on the default background color in VS. This is the value for a light grey: RGB(221, 221, 221).
Here are the registry keys that I know of:
Visual Studio 2010: HKCU\Software\Microsoft\VisualStudio\10.0\Text Editor
Visual Studio 2008: HKCU\Software\Microsoft\VisualStudio\9.0\Text Editor
Visual Studio 2005: HKCU\Software\Microsoft\VisualStudio\8.0\Text Editor
Visual Studio 2003: HKCU\Software\Microsoft\VisualStudio\7.1\Text Editor
For those running Visual Studio 2010, you may want to install the following extensions rather than changing the registry yourself:
These are also part of the Productivity Power Tools, which includes many other very useful extensions.
Dave and OneDayWhen are correct in saying that you need to right click the desired project in the IDE and select Set as Start Up when you have multiple projects loaded and you want to choose which one is executed.
Copy the Icon change the target to something like
"C:\Program Files\Microsoft Visual Studio\VB98\VB6.EXE" "D:\MyProjects\MyOneProject\trunk\MyOneProject.vbp"
Change Startup In to D:\MyProjects\MyOneProject\trunk
I found it more just to change the StartupIn to my Master Project Directory rather than have icons for specific project. Like D:\MyProjects
P.S. In case you are wondering on why you would ever select a non-EXE project as startup. You do this at times when you are debugging a non-EXE. When you startup a non-EXE you have several options. Among them you can fire up a application,or have sit there until something calls it. Useful when you are debugging a Active DLL or Control and using Excel or another 3rd party software that you don't have the source too.