[2005] Photo Management

Hey everyone. I have decided I want to have a crack at making something that will manage photos. The first thing I want the app to do is
to pick up when someone plugs their camera in to the usb port and the I want
the program(which will be running in the task bar) to ask the user whethe he would like the photos to be uploaded to the program. and then for it to actually put the photos in the program

Any ideas on how I could do that:)

Your first step is to write the code that detects the device being plugged in. You will need to use WMI for this. Do a search on RegisterDeviceNotification.

Ok, found a sample:

Code:

---

here is a WinForm application to detect Human Input Devices (HID),
including all kinds of mouse / keyboard / keypad / joystick / etc. If you
want to detect all USB devices, uses GUID_DEVINTERFACE_USB_DEVICE =
"A5DCBF10-6530-11D2-901F-00C04FB951ED" instead.

---- begin ---
using System.Runtime.InteropServices;

namespace WindowsApplication1
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;

public Form1()
{
InitializeComponent();
RegisterHidNotification();
}

protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case Win32.WM_DEVICECHANGE: OnDeviceChange(ref m); break;
}
base.WndProc (ref m);
}

void OnDeviceChange(ref Message msg)
{
int wParam = (int)msg.WParam;
if(wParam == Win32.DBT_DEVICEARRIVAL) label1.Text = "Arrival";
else if(wParam == Win32.DBT_DEVICEREMOVECOMPLETE) label1.Text =
"Remove";
}

void RegisterHidNotification()
{
Win32.DEV_BROADCAST_DEVICEINTERFACE dbi = new
Win32.DEV_BROADCAST_DEVICEINTERFACE();
int size = Marshal.SizeOf(dbi);
dbi.dbcc_size = size;
dbi.dbcc_devicetype = Win32.DBT_DEVTYP_DEVICEINTERFACE;
dbi.dbcc_reserved = 0;
dbi.dbcc_classguid = Win32.GUID_DEVINTERFACE_HID;
dbi.dbcc_name = 0;
IntPtr buffer = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(dbi, buffer, true);
IntPtr r = Win32.RegisterDeviceNotification(Handle, buffer,
Win32.DEVICE_NOTIFY_WINDOW_HANDLE);
if(r == IntPtr.Zero)
label1.Text = Win32.GetLastError().ToString();
}
}

class Win32
{
public const int
WM_DEVICECHANGE = 0x0219;
public const int
DBT_DEVICEARRIVAL = 0x8000,
DBT_DEVICEREMOVECOMPLETE = 0x8004;
public const int
DEVICE_NOTIFY_WINDOW_HANDLE = 0,
DEVICE_NOTIFY_SERVICE_HANDLE = 1;
public const int
DBT_DEVTYP_DEVICEINTERFACE = 5;
public static Guid
GUID_DEVINTERFACE_HID = new
Guid("4D1E55B2-F16F-11CF-88CB-001111000030");

[StructLayout(LayoutKind.Sequential)]
public class DEV_BROADCAST_DEVICEINTERFACE
{
public int dbcc_size;
public int dbcc_devicetype;
public int dbcc_reserved;
public Guid dbcc_classguid;
public short dbcc_name;
}

[DllImport("user32.dll", SetLastError=true)]
public static extern IntPtr RegisterDeviceNotification(
IntPtr hRecipient,
IntPtr NotificationFilter,
Int32 Flags);

[DllImport("kernel32.dll")]
public static extern int GetLastError();
}
}

---

You will need to translate to VB.NET.

I will do that. C# isnt very different to vb.net is it?

Quote:

---

Originally Posted by tarik666

I will do that. C# isnt very different to vb.net is it?

---

Nope, not very different at all.

god this is hard. Can anyone help.

What do you find hard? Perhaps we can guide you through it.

Well i dont understand that code.

Try a converter. It'll be erroneous but most of it will be converted for you and you can convert the 'mistakes' to proper VB.NET code.

Used InstantVB to convert the code (Not sure how accurate / if it will work at all)

Code:

---

Imports Microsoft.VisualBasic
Imports System.Runtime.InteropServices

Namespace WindowsApplication1
Public Class Form1
        Inherits System.Windows.Forms.Form
Private label1 As System.Windows.Forms.Label

Public Sub New()
InitializeComponent()
RegisterHidNotification()
End Sub

Protected Overrides Sub WndProc(ByRef m As Message)
Select Case m.Msg
Case Win32.WM_DEVICECHANGE
        OnDeviceChange(m)
End Select
MyBase.WndProc (m)
End Sub

Private Sub OnDeviceChange(ByRef msg As Message)
Dim wParam As Integer = CInt(Fix(msg.WParam))
If wParam = Win32.DBT_DEVICEARRIVAL Then
        label1.Text = "Arrival"
ElseIf wParam = Win32.DBT_DEVICEREMOVECOMPLETE Then
        label1.Text = "Remove"
End If
End Sub

Private Sub RegisterHidNotification()
Dim dbi As New Win32.DEV_BROADCAST_DEVICEINTERFACE()
Dim size As Integer = Marshal.SizeOf(dbi)
dbi.dbcc_size = size
dbi.dbcc_devicetype = Win32.DBT_DEVTYP_DEVICEINTERFACE
dbi.dbcc_reserved = 0
dbi.dbcc_classguid = Win32.GUID_DEVINTERFACE_HID
dbi.dbcc_name = 0
Dim buffer As IntPtr = Marshal.AllocHGlobal(size)
Marshal.StructureToPtr(dbi, buffer, True)
Dim r As IntPtr = Win32.RegisterDeviceNotification(Handle, buffer, Win32.DEVICE_NOTIFY_WINDOW_HANDLE)
If r = IntPtr.Zero Then
label1.Text = Win32.GetLastError().ToString()
End If
End Sub
End Class

Friend Class Win32
Public Const WM_DEVICECHANGE As Integer = &H0219
Public Const DBT_DEVICEARRIVAL As Integer = &H8000, DBT_DEVICEREMOVECOMPLETE As Integer = &H8004
Public Const DEVICE_NOTIFY_WINDOW_HANDLE As Integer = 0, DEVICE_NOTIFY_SERVICE_HANDLE As Integer = 1
Public Const DBT_DEVTYP_DEVICEINTERFACE As Integer = 5
Public Shared GUID_DEVINTERFACE_HID As New Guid("4D1E55B2-F16F-11CF-88CB-001111000030")

<StructLayout(LayoutKind.Sequential)> _
Public Class DEV_BROADCAST_DEVICEINTERFACE
Public dbcc_size As Integer
Public dbcc_devicetype As Integer
Public dbcc_reserved As Integer
Public dbcc_classguid As Guid
Public dbcc_name As Short
End Class

<DllImport("user32.dll", SetLastError:=True)> _
Public Shared Function RegisterDeviceNotification(ByVal hRecipient As IntPtr, ByVal NotificationFilter As IntPtr, ByVal Flags As Int32) As IntPtr
End Function

<DllImport("kernel32.dll")> _
Public Shared Function GetLastError() As Integer
End Function
End Class
End Namespace

---

alright. The code isnt running errors. Some I am going to test it out. Just as a thought. Does this detect cameras only or anything that is plugged into the usb port

Yes, it should detect if any device is plugged in to the USB port. "SHOULD" being the keyword here. I haven't actually used it myself :D

Well I wonder if vb.net has a way of checking what sort of device it is. I want it to only alert me if its a camera