Imports System
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.Threading.Tasks
Imports System.Windows.Forms
' make sure that using System.Diagnostics; is included
Imports System.Diagnostics
' make sure that using System.Security.Principal; is included
Imports System.Security.Principal
' make sure that using System.Runtime.InteropServices; is included
Imports System.Runtime.InteropServices
Public Class Form1
Public Sub New()
MyBase.New
InitializeComponent()
comboBox1.SelectedIndex = 2
End Sub
#Region "basic function for app"
Private Sub lblLink_Click_1(sender As Object, e As EventArgs) Handles lblLink.Click
Process.Start("www.vclexamples.com")
End Sub
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean
If (keyData = Keys.Escape) Then
Me.Close()
Return True
End If
Return MyBase.ProcessCmdKey(msg, keyData)
End Function
#End Region
Private Function ConvertBytesToMegabytes(bytes As ULong) As ULong
Return (bytes \ 1024) \ 1024
End Function
Public Function GetDiskSizeTotal(volumeName As String, ByRef avail As ULong, ByRef total As ULong, ByRef totalfree As ULong) As ULong
[MyClass].GetDiskFreeSpaceEx(volumeName, avail, total, totalfree)
Return total
End Function
Public Function GetDiskSize(volumeName As String) As ULong
Dim avail As ULong = 0
Dim total As ULong = 0
Dim totalfree As ULong = 0
[MyClass].GetDiskFreeSpaceEx(volumeName, avail, total, totalfree)
Return total
End Function
Private Sub button1_Click(sender As Object, e As EventArgs) Handles button1.Click
Dim avail As ULong = 0, total As ULong = 0, totalfree As ULong = 0
' read size
GetDiskSizeTotal(comboBox1.SelectedItem.ToString(), avail, total, totalfree)
' write size in label
label1.Text = "Avaliable disk space (for this user): " & ConvertBytesToMegabytes(avail).ToString() & " MB"
label2.Text = "Total disk space: " & ConvertBytesToMegabytes(GetDiskSizeTotal(comboBox1.SelectedItem.ToString(), avail, total, totalfree)) & " MB"
label3.Text = "Free disk space: " & ConvertBytesToMegabytes(avail).ToString() & " MB"
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
End Sub
End Class
Public Class [MyClass]
' import from kernel32.dll function GetDiskFreeSpaceEx (total amount)
<DllImport("kernel32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Friend Shared Function GetDiskFreeSpaceEx(lpDirectoryName As String, ByRef lpFreeBytesAvailable As ULong, ByRef lpTotalNumberOfBytes As ULong, ByRef lpTotalNumberOfFreeBytes As ULong) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
' import from kernel32.dll function GetDiskFreeSpaceEx
<DllImport("kernel32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Friend Shared Function GetDiskFreeSpace(GetDiskFreeSpaces As ULong, ByRef lpSectorsPerCluster As ULong, ByRef lpBytesPerSector As ULong, ByRef lpNumberOfFreeClusters As ULong, ByRef lpTotalNumberOfClusters As ULong) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
End Class
