UEFI dual boot

[Wojciech Puchar]

i have to install windows shit on separate partition to use it when 
someone really want me to use some video chats or other nonsense that 
doesn't work otherwise.
In Virtualbox sound doesn't work properly and i have no idea why.

Could anyone point me how to make a boot menu or something like that after 
i will:

1) clean whole disk
2) install UEFI windows but without allocating whole disk for it
3) install UEFI FreeBSD - how no problem in that.

then i would be able to select what to boot by entering UEFI shell and 
manually selecting proper loader.

How can it be made better