Here is what I found over at M$
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FILE INFORMATION:
Name: shdoclc.dll
Description: Shell Doc Object and Control Library
Version: 6.0.2600.0
DLLSelfRegister: No
PRODUCTS CONTAINING THIS VERSION:
PRODUCT SIZE MOD DATE CAB/IEXPRESS RELATIVE PATH
Internet Explorer 6.0 548,864 8/17/2001 iemil_3.cab
Internet Explorer 6.0 548,864 8/17/2001 iew2k_3.cab
Internet Explorer 6.0 548,864 8/17/2001 ient_2.cab
Internet Explorer 6.0 548,864 8/17/2001 ie_2.cab
Windows XP Professional 2002 548,864 8/17/2001 \i386
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HERE is a good link to find out some info on DLL's.
I also found this on a google search.
HEREand
HERE
M$ only shows this used in IE 5.5 and up. But it is in office200 and some other programs also. On the first link go there and type in the dll and then click on more info in the lower part of the page. It will tell what M$ programs use it.