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Editorial Team
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Asked: 2026-05-14T03:26:11+00:00

I know we can enumerate the windows controls with in the dialog and using

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I know we can enumerate the windows controls with in the dialog and using the callback we can collect the windows controls.

I am looking for specific way to filtering out the controls based on interface implementation. For example, If the Active-X controls derives from interface IDataControl, I want that to add to my interest collection list.

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  1. Editorial Team

    Here is the generic process to get the ole/active-x controls inside the dialog.

    1. Do EnumWindows with the callback
    2. In the callback, attach the windows handle to CWnd

    3. Try to get IUnknown pointer for the control CWnd::GetControlUnknown
      Tips: How to detect whether a control is standard or active-x control?

    4. If returned IUnknown is not null, do queryInterface for IDataControl.

    5. If IDataControl instance not null, add to collection
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