When you open a project or solution in Microsoft Visual Studio, the code editor and Windows Form Designer windows are opened in the same state they were in when the project was last saved. Once a project or solution is opened, use the Solution Explorer to navigate between the files of the opened project or solution.
To open an existing project or solution file
The Open Project dialog box will allow you to open a wide range of project files which include VB.NET and C# projects, Microsoft Visual Studio .NET solutions, and Microsoft Visual C++ projects. Use the Objects of Type drop-down list to control which type of projects or solutions you see in the file selection area of the Open Project dialog box.
For information on migrating from VBA to VB.NET, see http://www.autodesk.com/vba. The 'Microsoft Visual Basic for Applications Module FAQ' page contains information about and resources related to the current VBA implementation in AutoCAD-based products. Use the links under the 'DevTV: AutoCAD VBA to VB.NET Migration Basics' FAQ to access videos that cover how to migrate VBA code to VB.NET.