EwfVolume Class (Standard 7 SP1)

7/8/2014

The EwfVolume class is used to change the configuration of an Enhanced Write Filter volume.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties.

Syntax

class EwfVolume
{
  string DriveLetter;
  string Name;
};

Members

The EwfVolume class defines the following types of members:

• Methods
• Properties

Methods

The EwfVolume class defines the following methods.

Properties

The EwfVolume class defines the following properties.

• DriveLetter

  • Data type: string

    Access type: Read-only

    Returns the drive letter of the volume.

• Name

  • Data type: string

    Access type: Read-only

    Qualifiers: Key

    Returns the name of the volume.

Example

This example can be used to list all the methods for EwfVolume.

Windows PowerShell

$ComputerName = "localhost"   # or "remote-machine-name"
$Namespace = "root\Microsoft\WriteFilters"
$Class = "EwfVolume"

Write-Host "Retrieving EWF volume methods..."

Get-WmiObject `
   -ComputerName $ComputerName `
   -Namespace $Namespace `
   -Class $Class `
| Get-Member * | Format-List Name, Definition

VBScript

strComputer = "localhost"   ' or "remote-machine-name"
strNamespace = "\root\Microsoft\WriteFilters"
strClass = "EwfVolume"

WScript.Echo "Retrieving EWF volume methods..."

On Error Resume Next

Set EwfVolume = GetObject("WINMGMTS:\\" & strComputer & strNamespace & ":" & strClass)

If Err.number <> 0 Then
   WScript.Echo "Method exited with error code: 0x" & Hex(Err.number)
   WScript.Echo Err.source & " - " & Err.Description
   WScript.Quit(1) 
End If

For Each M In EwfVolume.Methods_
   WScript.Echo "Method: ", M.Name
   WScript.Echo "Description: ", M.Qualifiers_("Description")
   If (M.InParameters Is Nothing) Then
      WScript.Echo "No input parameters"
   Else
      For Each Param In M.InParameters.Properties_
         WScript.Echo "Parameter Name: ", Param.Name
         WScript.Echo "Parameter Type: ", TypeName(Param.CIMType)
      Next
   End If
Next

Function GetTypeName(typeNumber)   
   Select Case typeNumber
      Case 2 GetTypeName = "16 bit Integer"
      Case 3 GetTypeName = "32 bit Integer"
      Case 4 GetTypeName = "32 bit Real Number"
      Case 5 GetTypeName = "64 bit Real Number"
      Case 8 GetTypeName = "String"
      Case 11 GetTypeName = "Boolean"
      Case 13 GetTypeName = "CIM Object"
      Case 16 GetTypeName = "signed 8 bit Integer"
      Case 17 GetTypeName = "unsigned 8 bit Integer"
      Case 18 GetTypeName = "unsigned 16 bit Integer"
      Case 19 GetTypeName = "unsigned 32 bit Integer"
      Case 20 GetTypeName = "signed 64 bit Integer"
      Case 21 GetTypeName = "unsigned 64 bit Integer"
      Case 101 GetTypeName = "Date/time value"
      Case 103 GetTypeName = "16 bit Char"
      Case Else
         GetTypeName = "Not supported"
   End Select
End Function

Requirements