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COMMAP Sample: Demonstrates COM Interface Map Entry Macros with Compiler COM Support

This basic sample shows how different COM interface map entry macros are used. This sample uses the smart pointer mechanism (_com_ptr_t) of Visual C++ native compiler COM support. The #import mechanism is used instead of the MIDL-generated .h and .c files to provide marshaling information.

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 this sample

  1. Open the solution commap.sln.

  2. On the Build menu, click Build Solution.

  3. Set ctlcomm as the startup project (right-click the project node and click Set as StartUp Project) and press F5.

  4. Open Commap.htm in your Web browser. It includes comments about each type of map entry.

CTLCOMM is an MFC-wrapped Visual C++ compiler COM support controller of the COMMAP ATL server.

This sample demonstrates the following keywords:

dispinterface; #import; _com_ptr_t; _variant_t; _bstr_t; _com_error

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