When there are multiple `AddRadioButton`s, the icons placed with `.AddCustomButton` are misaligned.

Reproduce the provided Sample_NoCustomIcon_multiRadioButtons case using cTaskDialog, focusing on the interaction between AddRadioButton, AddCustomButton, and ShowDialog. Compare the displayed custom-button icons with the button order and radio-button count; done means each custom button keeps its assigned icon when multiple radio buttons are present.

Hello. Thank you very much for the fix in issue #11.

I attempted to reopen that issue because I found an additional problem, but I received a "no permission" error. Therefore, I apologize for creating a new issue.

I have confirmed that the procedure Sample_NoCustomIcon from issue #11 works correctly. (Code omitted here.)

However, in practical use cases, it is very common to have multiple radio buttons.

For example:

Private Sub Sample_NoCustomIcon_multiRadioButtons()
    Dim testIcon As LongPtr, tmp As LongPtr
    Debug.Print ExtractIconExA("C:\Windows\System32\SHELL32.dll", 0, tmp, testIcon, 1)

    With New cTaskDialog
        .CommonButtons = TDCBF_CLOSE_BUTTON
        
        .AddRadioButton 201, "testChose1"
        .AddRadioButton 202, "testChose2"
        
        .AddCustomButton 102, "button 2", testIcon
        .AddCustomButton 101, "button 3", testIcon

        .Flags = TDF_USE_COMMAND_LINKS

        .ParenthWnd = Application.hWnd
        .ShowDialog

    End With

End Sub

When there are multiple AddRadioButton calls like this, the icon assigned in .AddCustomButton 102 is no longer displayed.

Based on my own testing, it seems that the icon assignment for .AddCustomButton is offset by the number of radio buttons added. In other words, the icon index appears to shift when radio buttons are present.

Would it be possible to ensure that the icon assignment for .AddCustomButton remains correct even when multiple .AddRadioButton calls are used?

Thank you very much for your time and support.