How to hyperlink to folder showing files with specified word only?

[London12F]

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[TD]There is folder "Doc" at C:\ that has 5 files say:[/TD]
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[TD]File 1[/TD]
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[TD]File 2[/TD]
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[TD]File 3[/TD]
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[TD]Other 1[/TD]
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[TD]Other 2[/TD]
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[TD][/TD]
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[TD]where File 1,2 and Other 2 is pdf and remaining is msg.[/TD]
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[TD][/TD]
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[TD]The formula below can hyperlink to folder "Doc":[/TD]
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[TD]=HYPERLINK("C:\Doc","File")[/TD]
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[TD][/TD]
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[TD]How to modify the formula to show folder with file having specified word "File" only?[/TD]
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[TD](Same result as search word "File" at folder "Doc")[/TD]
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