If you install some windows program to your wine and having trouble in installing dll and ocx to your wine, do it manually.

For Registering:
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wine regsvr32 foo.dll
wine regsvr32 foo.ocx

For Unregistering :
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wine regsvr32 /u foo.dll
wine regsvr32 /u foo.ocx

you can do it as user that wine is installed or as a super user.