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title: "COM Modules Classes (ATL) | Microsoft Docs"
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# COM Modules Classes
The following classes provide support for a COM module:  
  
-   [CAtlBaseModule](../atl/reference/catlbasemodule-class.md) This class is instantiated in every ATL project.  
  
-   [CAtlComModule](../atl/reference/catlcommodule-class.md) This class implements a COM server module.  
  
-   [CAtlModule](../atl/reference/catlmodule-class.md) This class provides methods used by several ATL module classes.  
  
-   [CAtlModuleT](../atl/reference/catlmodulet-class.md) This class implements an ATL module.  
  
-   [CAtlExeModuleT](../atl/reference/catlexemodulet-class.md) This class represents the module for an application.  
  
-   [CAtlServiceModuleT](../atl/reference/catlservicemodulet-class.md) This class implements a service.  
  
-   [CAtlWinModule](../atl/reference/catlwinmodule-class.md) This class provides support for ATL windowing components.  
  
-   [CComModule](../atl/reference/ccommodule-class.md) This class implements a DLL or EXE module. Obsolete in ATL 7.0.  
  
-   [CComAutoThreadModule](../atl/reference/ccomautothreadmodule-class.md) This class implements an EXE module, with support for multiple thread-pooled apartments. Obsolete in ATL 7.0.  
  
## Related Articles  
 [ATL Module Classes](../atl/atl-module-classes.md)  
  
## See Also  
 [Class Overview](../atl/atl-class-overview.md)   
 [Module Classes](../atl/atl-module-classes.md)