strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\CIMV2\Security\MicrosoftVolumeEncryption")
Set colItems = objWMIService.ExecQuery("SELECT * FROM Win32_EncryptableVolume",,48)

Dim arEncryptionMethod
arEncryptionMethod = Array("None", "AES 128 With Diffuser", "AES 256 With Diffuser", "AES 128", "AES 256")

Dim arProtectionStatus
arProtectionStatus = Array("Protection Off", "Protection On", "Protection Unknown")

Dim arConversionStatus
arConversionStatus = Array("Fully Decrypted", "Fully Encrypted", "Encryption In Progress", "Decryption In Progress", "Encryption Paused", "Decryption Paused")

Dim arLockStatus
arLockStatus = Array("Unlocked", "Locked")

For Each objItem in colItems
  Dim EncryptionMethod
  Dim ProtectionStatus
  Dim ConversionStatus
  Dim EncryptionPercentage 'Percentage of the volume that is encrypted
  Dim VolumeKeyProtectorID
  Dim LockStatus

  objItem.GetEncryptionMethod EncryptionMethod
  objItem.GetProtectionStatus ProtectionStatus
  objItem.GetConversionStatus ConversionStatus, EncryptionPercentage
  objItem.GetKeyProtectors 0,VolumeKeyProtectorID
  objItem.GetLockStatus LockStatus

  WScript.Echo "DeviceID: " & objItem.DeviceID
  Wscript.Echo "DriveLetter: " & objItem.DriveLetter
  Wscript.Echo "EncryptionMethod: " & arEncryptionMethod(EncryptionMethod)
  Wscript.Echo "ProtectionStatus: " & arProtectionStatus(ProtectionStatus)
  Wscript.Echo "ConversionStatus: " & arConversionStatus(ConversionStatus)
  Wscript.Echo "EncryptionPercentage: " & EncryptionPercentage & "%"
  Wscript.Echo "LockStatus: " & arLockStatus(LockStatus)

  For Each objId in VolumeKeyProtectorID
    Dim VolumeKeyProtectorFriendlyName
    objItem.GetKeyProtectorFriendlyName objId, VolumeKeyProtectorFriendlyName
    If VolumeKeyProtectorFriendlyName <> "" Then
      Wscript.Echo "KeyProtectors: " & VolumeKeyProtectorFriendlyName
    End If

Documentation for functions, methods and properties used in this post: