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MEDriver Sample: Demonstrates COM Eventing in the .NET Framework

Visual Studio 2008

The MEDriver sample illustrates the use of COM events (fired from an unmanaged COM server) through a .NET Framework wrapper, automatically generated from the COM server's type library.

Security noteSecurity Note:

This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended.

To get samples and instructions for installing them:

  • On the Visual Studio Help menu, click Samples.

    For more information, see Visual Studio Samples.

  • The most recent version and complete list of samples is available online from the Visual Studio 2008 Samples page.

  • You can also locate samples on your computer's hard disk. By default, samples and a Readme file are copied into a folder under \Program Files\Visual Studio 9.0\Samples\. For Express editions of Visual Studio, all samples are located online.

To build and run MEDriver using Visual Studio

  1. In the Visual Studio IDE, load the solution file MEDriver.sln.

  2. In Solution Explorer, right-click the MEDriver solution.

  3. On the shortcut menu, click Build Solution.

  4. On the Debug menu, click Start.

When you run MEDriver.exe, click the Start button at least once, and then click the Advise button several times. Each click of the Advise button adds a sink to the Fire event, which makes the display wider. If you do not click the Advise button, you will not see any activity in the display.

This sample demonstrates the following keywords:

Control::CreateGraphics; Control::ClientRectangle; Graphics::DrawLine; Color::FromArgb; Mutex::WaitOne; Mutex::ReleaseMutex; Hashtable::Item; Application::Run; Button::Location; Button::Size; Button::Text; ControlCollection::AddRange