Getting the text from a dialog box that does not use a label control?

Question

This is a continuation of my previous question How to supress a dialog box an Inproc COM Server displays.

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Background:

A recap of my situation: I have

Answer 1

Thanks to Sertac's comment I found out that the text in Delphi's message boxes are not window objects, they are drawn on with the 'DrawText' methods. I used EasyHook to intercept the Windows API calls and I am now able to grab the text I care about.

////It appears that DrawText always calls DrawTextEx so it is getting intercepted twice.
//// Only need to hook DrawTextEx
static EasyHook.LocalHook _drawTextExAHook;

//Snip...

public override void Run()
{
    //Snip...

    IntPtr drawTextExAPtr = EasyHook.LocalHook.GetProcAddress("user32", "DrawTextExA");
    _drawTextExAHook = EasyHook.LocalHook.Create(drawTextExAPtr, new DrawTextExDelegate(DrawTextEx_Hooked), null);

    //The COM stuff must be run in a STA Thread so we can intercept the message boxes that it throws up.
    var staThread = new Thread(() =>
        {
            try
            {
                var threadID = new[] { GetCurrentThreadId() };
                //Enable the hook on the current thread.
                _drawTextExAHook.ThreadACL.SetInclusiveACL(threadID);

                //Tell the dummy form to start ComThread
                _dummyForm = new DummyForm(ComThread);
                Application.Run(_dummyForm);
            }
            finally
            {
                if(_drawTextExAHook != null)
                    _drawTextExAHook.Dispose();
            }
        });
    staThread.SetApartmentState(ApartmentState.STA);
    staThread.Name = "Com Thread";
    staThread.Start();

    //Wait for the Com Thread to finish.
    staThread.Join();

}

//Snip...

private delegate int DrawTextExDelegate(IntPtr hdc, string lpchText, int cchText,
                ref Rect lprc, uint dwDTFormat, ref DRAWTEXTPARAMS lpDTParams);

private int DrawTextEx_Hooked(IntPtr hdc, string lpchText, int cchText, ref Rect lprc, 
                                     uint dwDTFormat, ref DRAWTEXTPARAMS lpDTParams)
{
    LogErrorText(lpchText);
    return DrawTextEx(hdc, lpchText, cchText, ref lprc, dwDTFormat, ref lpDTParams);
}

[DllImport("user32.dll")]
static extern int DrawTextEx(IntPtr hdc, string lpchText, int cchText,
                             ref Rect lprc, uint dwDTFormat, ref DRAWTEXTPARAMS lpDTParams);