🚀 go-pugleaf

Uri wrote:
> Hi, when I connect OR disconnect the USB connector I reach the 
> breakpoint in function "OnDeviceChange", but the parameters 
> of 'm' are stay the same (it is not right), why?

> void TUSBApp_form::OnDeviceChange(Messages::TMessage m)

You have to test against m.WParam. Something like:

switch(m.WParam)
{
   case DBT_DEVICEARRIVAL:
	//a new device has been inserted
   break;
   case DBT_DEVICEREMOVECOMPLETE:
	//a device has been removed
   break;
}

Michel
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I tried that, it's not working, every time when the function is
call (when I connect or remove the USB device from the PC) the
parameter 'm.WParam' stay 7 (m.WParam = 7) Why does it not chaning?

Uri.


>You have to test against m.WParam. Something like:
>
>switch(m.WParam)
>{
>   case DBT_DEVICEARRIVAL:
>	//a new device has been inserted
>   break;
>   case DBT_DEVICEREMOVECOMPLETE:
>	//a device has been removed
>   break;
>}
>
>Michel

Uri wrote:

>I tried that, it's not working, every time when the function is
>call (when I connect or remove the USB device from the PC) the
>parameter 'm.WParam' stay 7 (m.WParam = 7) Why does it not chaning?

Look in DBT.H
7 is DBT_DEVNODES_CHANGED which you should be ignoring as Michel
pointed out.

>>switch(m.WParam)
>>{
>>   case DBT_DEVICEARRIVAL:
>>	//a new device has been inserted
>>   break;
>>   case DBT_DEVICEREMOVECOMPLETE:
>>	//a device has been removed
>>   break;
>>}
>>
>>Michel

Just a thought:
It could be that the mystery device you are unplugging isn't supposed
to report device arrival/removed. You might ask the manufacturer.

Uri wrote:
> I tried that, it's not working, every time when the function is
> call (when I connect or remove the USB device from the PC) the
> parameter 'm.WParam' stay 7 (m.WParam = 7) Why does it not chaning?

That's a DBT_DEVNODES_CHANGED. According to MSDN :
"The system broadcasts the DBT_DEVNODES_CHANGED device event when a 
device has been added to or removed from the system."
It seems there is no way to know if the device has been added or removed 
from the system.

Michel
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"Uri" <Uri@MyMail.com> wrote in message
news:4534d31d$1@newsgroups.borland.com...

>  void OnDeviceChange(Messages::TMessage );

Just an FYI, in a message map, you need to pass TMessage by reference, not
by value, just like when overriding WndProc():

    void __fastcall OnDeviceChange(Messages::TMessage &);


Gambit

No, it's not working either.... when I insert or remove my USB
device the 'WMDiskChange' function is call several times but at
each call I see in the debuger that Message.WParam = 7, when I 
insert, or when I remove the USB connector of the device. 

Any idea why? can it be a problem in the device itself?

Here is my last code - 


  void __fastcall WMDiskChange( TMessage &Message );

  BEGIN_MESSAGE_MAP
      MESSAGE_HANDLER( WM_DEVICECHANGE, TMessage, WMDiskChange )
  END_MESSAGE_MAP( TControl )


void __fastcall TForm1::WMDiskChange( TMessage &Message )
{
  int Value;

  Value = Message.WParam;  
  Value = Value;            // I set my breakpoint here 
}



>Just an FYI, in a message map, you need to pass TMessage by reference, not
>by value, just like when overriding WndProc():
>
>    void __fastcall OnDeviceChange(Messages::TMessage &);
>
>
>Gambit

>Just a thought:
>It could be that the mystery device you are unplugging isn't supposed
>to report device arrival/removed. You might ask the manufacturer.


How can the device send 'removed' report when I remove it? 
I mean, when I remove it, I disconnect the USB cable, so the 
device can't send anything becouse the cable is not connected 
any more to the PC..... am I wrong? 

Uri.

Uri wrote:
> No, it's not working either.... 

Have a look at RegisterDeviceNotification() in MSDN. It seems to be the 
correct way to do what you want.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/registering_for_device_notification.asp

or

http://tinyurl.com/w9h6w

Michel
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----------------------------------------

>Have a look at RegisterDeviceNotification() in MSDN. It seems to be the 
>correct way to do what you want.
>
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/registering_for_device_notification.asp
>
>or
>
>http://tinyurl.com/w9h6w
>
>Michel


Hi, I did not understand how to use it... from where do I call
to this function? 

what is the 'GUID InterfaceClassGuid' parameter from where do I 
take it?

Where exactly 'hWnd' get it's value?

Where do I find the defenition of DEV_BROADCAST_DEVICEINTERFACE ?

Which paarmeter shows me if the device was Inserted or Removed ?

Thanks.

I tried the following, 'NotificationFilter' data looks exactly
the same for 'Insert' or 'Remove'.

also, I did not know from where to take
'NotificationFilter.dbcc_classguid' data.

Thanks.



void __fastcall TForm1::WMDiskChange( TMessage &Message )
{
  DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;
  char szMsg[80];

  ZeroMemory( &NotificationFilter, sizeof( NotificationFilter ) );

  NotificationFilter.dbcc_size        = sizeof( DEV_BROADCAST_DEVICEINTERFACE );
  NotificationFilter.dbcc_devicetype  = DBT_DEVTYP_DEVICEINTERFACE;
//NotificationFilter.dbcc_classguid   = InterfaceClassGuid;  // ? ? ? ? ?  

  RegisterDeviceNotification( Application->Handle, &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE );
}

Uri wrote:

> Hi, I did not understand how to use it.

Sorry, I don't know either. I just did a search on MSDN and they mention 
that function in their article about Device Events. That's all I know 
about it.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/device_events.asp

Michel
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http://www.leunen.com/
----------------------------------------

Uri wrote:

> what is the 'GUID InterfaceClassGuid' parameter from where do I 
> take it?

Seems you can found it here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devinst_d/hh/DevInst_d/setup-cls_f7544122-69a3-4b34-85f5-db3714408026.xml.asp

> 
> Where exactly 'hWnd' get it's value?

That's the handle of *your* window receiving notification.

Michel
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Michel Leunen
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C++Builder, BCC5.5.1 Web site:
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----------------------------------------

"Uri" <Uri@nomail.com> wrote in message
news:453622af$1@newsgroups.borland.com...

> How can the device send 'removed' report when I remove it?
> I mean, when I remove it, I disconnect the USB cable, so the
> device can't send anything becouse the cable is not connected
> any more to the PC..... am I wrong?

The device itself is not the one sending the notifications.  The OS is, in
response to the device driver reporting that the device is
attached/detached.


Gambit

Uri wrote:

> Hi, I did not understand how to use it.

Ok, I tried with my usb key and it works.

RegisterDeviceNotification() tells the OS to send to your app the 
notification messages you want. Without this as you've noted, you don't 
receive the arrival or removal of your device.

First add this to your form constructor:

DEV_BROADCAST_DEVICEINTERFACE NotificationFilter = {0};
NotificationFilter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
NotificationFilter.dbcc_classguid = GUID_DEVCLASS_USB;
RegisterDeviceNotification(Handle,
                            &NotificationFilter,
                            DEVICE_NOTIFY_WINDOW_HANDLE);

And then in your message handler (WndProc or whatever):

if(Message.Msg == WM_DEVICECHANGE)
   {
     switch(Message.WParam)
     {
       case DBT_DEVICEARRIVAL:
         Application->MessageBox("Arrival","USB",MB_OK);
         break;
       case DBT_DEVICEREMOVECOMPLETE:
         Application->MessageBox("Removal","USB",MB_OK);
         break;
     }
   }

Don't know if it works for any USB devices but at least it works for my 
usb key.

HTH
Michel
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Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------

Michel Leunen wrote:

> First add this to your form constructor:
[snip]

I forgot to mention that you have to include:

#include <dbt.h>
#include <devguid.h>

Michel
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Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------

From where do I take the defenition for 'GUID_DEVCLASS_USB' ?  

I get this error message:

Undefined symbol 'GUID_DEVCLASS_USB'.

I have - 

#include <windows.h>
#include <dbt.h>         // for DEV_BROADCAST_DEVICEINTERFACE
#include <initguid.h>    // defines the guid macros



>I forgot to mention that you have to include:
>
>#include <dbt.h>
>#include <devguid.h>
>
>Michel

Hi,

I have found the file 'devguid.h' on my PC, in this file I find
the following Guids, which one is the Guid of my device? (the
device is just a small Electronic Card that someone has made for
us) also, after I know which GUID is the one that I need, how
do I write it in the command? can you pleaseshow me an example?

Thanks, and here is what I see in my file - 

DEFINE_GUID( GUID_DEVCLASS_1394,           0x6bdd1fc1L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_ADAPTER,        0x4d36e964L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_CDROM,          0x4d36e965L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_COMPUTER,       0x4d36e966L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_DECODER,        0x6bdd1fc2L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_DISKDRIVE,      0x4d36e967L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_DISPLAY,        0x4d36e968L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_FDC,            0x4d36e969L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_GPS,            0x6bdd1fc3L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_HDC,            0x4d36e96aL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_IMAGE,          0x6bdd1fc4L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_INFRARED,       0x6bdd1fc5L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_KEYBOARD,       0x4d36e96bL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_LEGACYDRIVER,   0x8ecc055dL, 0x047f, 0x11d1, 0xa5, 0x37, 0x00, 0x00, 0xf8, 0x75, 0x3e, 0xd1 );
DEFINE_GUID( GUID_DEVCLASS_MEDIA,          0x4d36e96cL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_MODEM,          0x4d36e96dL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_MONITOR,        0x4d36e96eL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_MOUSE,          0x4d36e96fL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_MTD,            0x4d36e970L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_MULTIFUNCTION,  0x4d36e971L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_NET,            0x4d36e972L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_NETCLIENT,      0x4d36e973L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_NETSERVICE,     0x4d36e974L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_NETTRANS,       0x4d36e975L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_NODRIVER,       0x4d36e976L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_PARALLEL,       0x811fc6a5L, 0xf728, 0x11d0, 0xa5, 0x37, 0x00, 0x00, 0xf8, 0x75, 0x3e, 0xd1 );
DEFINE_GUID( GUID_DEVCLASS_PCMCIA,         0x4d36e977L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_PORTS,          0x4d36e978L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_PRINTER,        0x4d36e979L, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_PRINTERUPGRADE, 0x4d36e97aL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_SCSIADAPTER,    0x4d36e97bL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_SOUND,          0x4d36e97cL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_STILLIMAGE,     0x6bdd1fc6L, 0x810f, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );
DEFINE_GUID( GUID_DEVCLASS_SYSTEM,         0x4d36e97dL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_TAPEDRIVE,      0x6d807884L, 0x7d21, 0x11cf, 0x80, 0x1c, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_UNKNOWN,        0x4d36e97eL, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 );
DEFINE_GUID( GUID_DEVCLASS_VOLUME,         0x71a27cddL, 0x812a, 0x11d0, 0xbe, 0xc7, 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f );

Thanks.

Uri wrote:
> From where do I take the defenition for 'GUID_DEVCLASS_USB' ?  

Hmm, re-read my post  :-)
*You* have:

> #include <windows.h>
> #include <dbt.h>         // for DEV_BROADCAST_DEVICEINTERFACE
> #include <initguid.h>    // defines the guid macros

And *I* wrote:
>> I forgot to mention that you have to include:
>>
>> #include <dbt.h>
>> #include <devguid.h>

Do you see the #include <devguid.h>?

Michel
-- 
----------------------------------------
Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------

Uri wrote:
> Hi,
> 
> I have found the file 'devguid.h' on my PC, in this file I find
> the following Guids,

It seems that there are a lot more GUIDs in my version of the file than 
yours. Weird. Which version of BCB are you using?

> which one is the Guid of my device? (the
> device is just a small Electronic Card that someone has made for
> us) 

I don't know. Ask the manufacturer.

Michel
-- 
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Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------

I work with Builder 4.0

Now I have all the following includes:

#include <windows.h>
#include <dbt.h>               // for DEV_BROADCAST_DEVICEINTERFACE
#include <initguid.h>          // defines the guid macros
#include <devguid.h>?

but I still get the Error message - 

Undefined symbol 'GUID_DEVCLASS_USB'

on the line - 

NotificationFilter.dbcc_classguid  = GUID_DEVCLASS_USB;


Do you have any Idea why ?



Michel Leunen <nospam@noreply.be> wrote:
>Uri wrote:
>> Hi,
>> 
>> I have found the file 'devguid.h' on my PC, in this file I find
>> the following Guids,
>
>It seems that there are a lot more GUIDs in my version of the file than 
>yours. Weird. Which version of BCB are you using?
>
>> which one is the Guid of my device? (the
>> device is just a small Electronic Card that someone has made for
>> us) 
>
>I don't know. Ask the manufacturer.
>
>Michel

Uri wrote:
> I work with Builder 4.0

Your header includes probably les classes then a more recent one.

> Undefined symbol 'GUID_DEVCLASS_USB'

Here is how it is defined in mine:

DEFINE_GUID( GUID_DEVCLASS_USB,                 0x36fc9e60L, 0xc465, 
0x11cf, 0x80, 0x56, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00 );

You can define it like this in your code:

GUID GUID_DEVCLASS_USB  = {0x36fc9e60, 0xc465, 0x11cf, {0x80, 0x56, 
0x44, 0x45, 0x53, 0x54, 0x00, 0x00}};

Michel
-- 
----------------------------------------
Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------