What should I do to use MFC dialogs from other libraries in my C++ project?

Question

I have an MFC ActiveX control project written in Visual Studio 2008 that contains a dialog box. The dialog box is wrapped in a class, as is normal. I want to use the dialog box in another project. Since an ActiveX (.ocx) file is a DLL, I can merely use the ActiveX file as I would a DLL.

The problem I ran into is that the dialog box's class has this near the top:

// Dialog Data
    //{{AFX_DATA(CDeploymentDlg)
    enum { IDD = IDD_DEPLOYMENT };

IDD_DEPLOYMENT is defined in the OCX's resource.h file. My current project also has a resource.h file. When I build my current project, I get an error because IDD_DEPLOYMENT is missing in my current project's resource.h file. My workaround was to copy the OCX project's resource.h file into a file named DeploymentDlgResource.h in my current project, and #include it before I #include the declaration for the dialog class.

This should work for now because I won't need any more dialog boxes in my current project. But what would happen if I created a project that needed another dialog box? What if that second dialog box also came from a separate library? Do I always need to use duplicate resource files like this? Do I have to worry about possible duplication of numbers used in them?

Answer 1

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