In the midst of all this publicity writing ATL-based applications, you will find little in the way of documentation on porting your legacy Win32 applications to ATL. Hopefully, these steps will ease that migration path.
- Include AtlBase.h file in StdAfx.h after AfxWin.h. This is to take advantage to declare a variable for CComModule. Because AtlWin.h file needs, _Module as variable of CComModule.
We have to keep extern because we are originally declaring variable in Application main file.
Then include the remaining files which helps for an ATL Application. In the insert Object of ATL uses ATLHost.h which needs to compile atlcom.h as before.
extern CComModule _Module;
- In the StdAfx.cpp, Include AtlImpl.cpp file.
- In the main Application file, add the following
Then, Add the following two lines, which are required to activate ATL Object Wizard, when you choose Insert ATLObject from Insert Menu.
<font color=green>//originally declaring the CComModule variable</font>
- Initialize the CComModule variable with ObjectMap and with the current instance in the WinMain function
- Add the <ProjectName>.idl file into the project and add the library related code:
- If you want to insert a dialog and want to show. Follow the above steps and declare the variable of ur dialog class and call DoModal with that variable (don't forget to include dlg header file).
This code has been tested with and works fine with the Windows CE environment.
References and Acknowledgments
- ATL Internals - Rector, Sells (My thanks to the Authors!)