spell check throwing exception

[gib99]

Hello,

I'm trying to get the English dictionary object MS Word uses and I want to use it to spell check. Here is the code I'm writing to do that:

Microsoft.Office.Interop.Word.Application app = new Microsoft.Office.Interop.Word.Application();
Microsoft.Office.Interop.Word.Dictionary EngDict = null;


foreach (Microsoft.Office.Interop.Word.Language l in app.Languages)
{
    if (l.Name.Contains("English (US)"))
    {
        EngDict = l.ActiveSpellingDictionary;
        break;
    }
}

EngDict.LanguageID = Microsoft.Office.Interop.Word.WdLanguageID.wdEnglishUS;
object EngDictObj = EngDict;
bool b = CheckSpelling("hello", EngDictObj);

Here's the CheckSpelling function:

private bool CheckSpelling(string word, object dict)
{
    Microsoft.Office.Interop.Word.Application app = new Microsoft.Office.Interop.Word.Application();
    object O = null;

    return app.CheckSpelling(word, ref O, ref O, ref dict, ref O, ref O, ref O, ref O, ref O, ref O, ref O, ref O, ref O);
}

The call to app.CheckSpelling(...) in my CheckSpelling function throws a COMException whose details say "Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT)". Can anyone see what I might be doing wrong?