Class Wizard

I'm creating a MFC Application with a help of a Book.
This text placed on that book

Code:

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    1. Open the Class Wizard, as you learned yesterday.

    2. Select the Member Variables tab, as shown in Figure 2.7.

    3. Select the ID of one of the controls that you need to attach a variable to, such as IDC_MSG.

    4. Click the Add Variable button.

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When I using Classwizard, I can't see any Control IDs on Member Variables tab?

On Some projects I can see the control IDs.
But On some projects I can't see those.
What is the problem on it?
Can I do this Manually?

Note:

On this project
I have placed many controls like (edit boxes, static text controlx, spin button, list box) on form.
I have selected correct class name on MFC Class Wirzard.