Plenty of VirtualBox users use VHDs (despite my urging otherwise). No one else has reported what you say, although I'm still not sure what you mean by "it simply does not see VHD files" - the expression is simply too vague to do anything with.
[Edit] If you have some kind of notion that the file menu in VirtualBox can "open" VHD files and let you browse through the contents - well you can forget that idea. VirtualBox creates and runs virtual machines - VHD and other disk images are present as data, not something which the user manipulates directly.
If you want to browse VHD files then try PowerISO
, I know it supports VDI, so I assume it will support VHD as well.