Issue with File search!!

Hi,
I wanted to write a small code to find all the files in the given path using some filter. The logic i implemented for this is shown in the code section below. When i use this and search, it does search but surprisingly not complete!!!
for example, if i search using the above logic with .chm filter, i get 91 files in the specified directories and subdirectories. but if i do a search using the windows search in the same path with the same filter i get around 95. i did see for many folders and the difference is too high some times!! any idea what happening?
string strFilter = "*.chm;";
                string[] m_arExt = strFilter.Split(';');
                foreach (string filter in m_arExt)
                {
                    string[] strFiles = Directory.GetFiles(@"D:\\Personal", filter, SearchOption.AllDirectories);
                    listBox1.Items.AddRange(strFiles);
                    int count = listBox1.Items.Count;
                    textBox1.Text = count.ToString();
                }

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Anjeneya MurthySr. ConsultantAsked:
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HarryNSCommented:
Do some of the files listed in Windows search are there in compressed folders (ZIP)???
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Anjeneya MurthySr. ConsultantAuthor Commented:
Full Points!! :)
Yes there were indeed files from zip. i did not notice that and was wondering what was happeining. Thanks a lot :)
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