Creating a simple Custom Control

http://www.codeproject.com/miscctrl/customcontrol.asp

Thank you for your feedback.

AndyAinscow, I tried it this way and it worked well. But how do I place this dialog into another one now? When I add it as a custom control another dialog I run into the following Assert:

Assertion failed in winocc.cpp line 330:

BOOL CWnd::ShowWindow(int nCmdShow)
{
----->      ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));

      if (m_pCtrlSite == NULL)
            return ::ShowWindow(m_hWnd, nCmdShow);
      else
            return m_pCtrlSite->ShowWindow(nCmdShow);
}

The debugger says:
m_hWnd = 0x00000000
m_pCtrlSite = 0x00000000


AlexFM, this is the example I started with and it worked well. But now I have the problem how to place other controls into this custom control.


Well, now I have a custom dialog where I can put some controls into and I have a custom control that can itself be put into a dialog. What I want is a custom dialog control that allows me to do both.

It can be difficult to use a dialogbox as a control within another dialogbox.   Before getting into this relatively complex arena, answer this:  

Are you sure that is necessary?  Can't you just put whatever you are putting in the control-dialog directly into the parent dialog?  Or perhaps make a series of property pages (depending upon your ultimate goal).

> Are you sure that is necessary?

Well, I have two cases where this would be helpfull.

First one is a configuration dialog that displays about a dozen very similar options where each needs a text field, two buttons and a readonly text field or an image that displays some state. It is not yet clear whether the customer ultimatly want's a combo box instead of the text field or a slider instead of the buttons. There is also some logic and validating neccessary for each option and the sub controls need to interact with each other. I think think this cries for some kind of encapsulation although I do not necessarily need to be able to layout the sub controls in the visual resource editor.

The second one is is a rather complex dialog which I need only once. But it is not yet decided whether this will become a page in a tab control or should be part of the main window without a tab control around it (maybe even configurable by the user).

If you mean you want for example 5 sub dialogs all looking the same but displaying different info then I would jst have one dialog and reset the contents depending on what needs to be shown.
To display different sub dialogs dynamically swapped inside another is a description of the PropertySheet - PropertyPage logic.

AndyAinscow, I'm not sure whether I understand you right. I need these similar subdialogs to be visible side by side at the same time inside a larger dialog not just one at a time. Is this possible with PropertySheet - PropertyPage logic? How?