MEDriver Sample: Demonstrates COM Eventing in the .NET Framework

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 intended to illustrate a concept, and it shows only the code that is relevant to that concept. It may not meet the security requirements for a specific environment, and it should not be used exactly as shown. We recommend that you add security and error-handling code to make your projects more secure and robust. Microsoft provides this sample code "AS IS" with no warranties.

To get samples and instructions for installing them:

To access samples from Visual Studio

  • On the Help menu, click Samples.

    By default, these samples are installed in drive:\Program Files\Microsoft Visual Studio 10.0\Samples\.

  • For the most recent version of this sample and a list of other samples, see Visual Studio Samples on the MSDN Web site.

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