# Expression Tree Visualizer Sample (Visual Basic)

### To get samples and instructions for installing them

- Do one or more of the following:

  - On the Help menu, click Samples.

    The Readme displays information about samples.

  - Visit the Visual Studio 2008 Samples Web site. The most recent versions of samples are available there.

  - Locate samples on the computer on which Visual Studio is installed. By default, samples and a Readme file are installed in drive:\Program Files\Microsoft Visual Studio 9.0\Samples\lcid. For Express editions of Visual Studio, all samples are located online.

For more information, see Locating Sample Files.

Note:
The Expression Tree Visualizer can be used in a debug environment to visualize expressions. To use the visualizer, you must copy the DLL that is generated by the ExpressionTreeVisualizer project to \Documents\Visual Studio 2008\Visualizers. You may have to create the Visualizers folder. In Windows XP and earlier versions, use the My Documents directory instead of Documents. If you have appropriate permissions, you can also copy the file to the following folder: \Program Files\Microsoft Visual Studio 2008\Common7\Packages\Debugger\Visualizers.

### To run this sample

- Press F5.

  To use the Visualizer, copy the DLL that is generated by the ExpressionTreeVisualizer project to the following location:

  - In Windows XP: My Documents\Visual Studio 2008\Visualizers

  - In Windows Vista: Documents\Visual Studio 2008\Visualizers

# Demonstrates

The Expression Tree Visualizer can be used in a debug environment to visualize expressions.

This console program provides the ability to host the visualizer outside Visual Studio without having to copy the DLL.

The visualizer window sometimes becomes hidden if you run this program in console mode. If you encounter this problem, try using the GuiHost application instead of the ExpressionTreeVisualizer application.

For more information, see Expression Trees.