New Post: How to create a TaskPanel like control (Action Pane?) in Office 2003

string guid = Guid.NewGuid().ToString();

string wordApplicationCaption = _wordApplication.Caption;

int wordHwnd = 0;
try
{
    _wordApplication.Caption = guid;
    wordHwnd = FindWindow("OpusApp", _wordApplication.ActiveDocument.Name + " - " + guid);
}
finally
{
    _wordApplication.Caption = wordApplicationCaption;
}

NativeWindow wordWindow = new NativeWindow();
wordWindow.AssignHandle(new IntPtr(wordHwnd));

_olderOfficePanelForm = new OlderOfficePaneForm();
_olderOfficePanelForm.Text = _panelTitle;
_olderOfficePanelForm.Show(wordWindow);