How to read value of activex control from word 2010 docx in c#

public void OpenDocument(string sMyFileName,string sAppType)
{
    sFileName = sMyFileName;

   
    if (acWord == null && sAppType=="W")
        { acWord = new Microsoft.Office.Interop.Word.ApplicationClass(); }
    
    if (wDocument != null) { try { CloseAndSave(sAppType); } catch { } }

   
    if (iWindow == 0 && sAppType == "W") { iWindow = FindWindow("Opusapp", null); }
    
    if (iWindow != 0)
    {
        SetParent(iWindow, this.Handle.ToInt32());

        object oFileName = sFileName;
        object oReadOnly = false;
        object oIsVisible = true;
        object oMissing = System.Reflection.Missing.Value;

        try
        {
            if (iWindow == 0) { throw new Exception(); }
                       if (sAppType == "W")
            {
                if (acWord.Documents == null && sAppType == "W") { throw new Exception(); }

                if (acWord != null && acWord.Documents != null && sAppType == "W")
                { wDocument = acWord.Documents.Open(ref oFileName, ref oMissing, 
                    ref oReadOnly, ref oMissing, ref oMissing, ref oMissing, 
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing, 
                    ref oMissing, ref oIsVisible, ref oMissing, ref oMissing, 
                    ref oMissing, ref oMissing); }

                if (wDocument == null && sAppType == "W") { throw new Exception(); }
            }
            /
        catch { }
        try
        {
                        if (sAppType == "W")
            {
                acWord.Visible = true;
                acWord.Activate();                        
            }
            
            SetWindowPos(iWindow, this.Handle.ToInt32(), 0, 0, this.Bounds.Width, 
                         this.Bounds.Height, (0x4 | 0x2 | 0x20));

            OnResize(new EventArgs());
           
        }
        catch { MessageBox.Show("Error..."); }
        this.Parent.Focus();
    }