谁能告诉我这些dll文件分别是干什么用的，见者有份，急

直到一个算一个吧，最好是告诉我哪个是Qreport4需要的
advapi32.dll
BDPlugin.dll
clbcatq.dll
clusapi.dll
colbact.dll
comctl32.dll
comdlg32.dll
comres.dll
comsvcs.dll
expsrv.dll
gdi32.dll
helper.dll
imm32.dll
kernel32.dll
KMailFun.dll
lpk.dll
msadce.dll
msadcer.dll
msado15.dll
msadrh15.dll
MSCTF.dll
msdart.dll
MSIMTF.dll
msjet40.dll
msjetoledb40.dll
msjint40.dll
msjter40.dll
msjtes40.dll
msvcrt.dll
mswstr10.dll
mtxclu.dll
mwsoeplg.dll
netapi32.dll
ntdll.dll
ole32.dll
oleaut32.dll
oledb32.dll
Oledb32r.dll
olepro32.dll
PAN24_2K.Dll
resutils.dll
rpcrt4.dll
secur32.dll
shell32.dll
shlwapi.dll
Unidrv.dll
Unidrvui.dll
user32.dll
userenv.dll
usp10.dll
uxtheme.dll
vbajet32.dll
version.dll
ws2_32.dll
ws2help.dll
wsock32.dll