Powershell: Initialise and mount VHD disks - powershell

Question

Powershell: Initialise and mount VHD disks
Using Powershell and VBoxManage (VirtualBox), I can create and mount a VHD disk, as follows:
$vhdpath="c:\myvhd.vhd"
vboxmanage createmedium disk --filename $vhdpath --sizebyte 200 --format VHD --variant Fixed
$vhd = Mount-DiskImage -PassThru $vhdpath -StorageType VHD
if(-not $vhd) {
Write-Host "Error mounting VHD"
exit
}
$vhd=Get-DiskImage -ImagePath $vhd.ImagePath
Initialize-Disk -Number $vhd.Number -PartitionStyle MBR
$partition = New-Partition -AssignDriveLetter -UseMaximumSize -DiskNumber $vhd.Number
$volume = Format-Volume -FileSystem FAT32 -Confirm:$false -Force -Partition $partition
Of course it is possible to replace vboxmanage ... with Hyper-V equivalent commands.
Two questions:
When the VHD disk is visible to PS, so is to the OS and, before the PS script formats it, an annoying Windows pop-up appears proposing to format the disk. How can I get rid of it?
In general, it is possible to mount a VHD disk as a removable disk. Is it possible to do so with PS too?
I am primarily (but not necessarily) looking for commands that do not require Hyper-V being installed.