Detect the Insertion/Removal of a USB Device in Windows using Windows Dbt.h

[Courtney_L]

Overview
This example toggles an LED light whenever a USB device is inserted or removed from a computer using LabWindows/CVI.

Description

If the device is a recognized type, the Device Type will be displayed. The following Device Types are recognized:

Device Type 0: OEM- or IHV-defined device type

Device Type 2: Logical volume (eg, thumb drive)

Device Type 3: Port device (serial or parallel)

Information on this Windows header file and associated functionality can be found on MSDN. The following link describes Device Types used by this header file: http://msdn.microsoft.com/en-us/library/windows/desktop/aa363246(v=vs.85).aspx

Requirements

• LabWindows/CVI 2012 (or compatible)

Steps to Implement or Execute Code

1. Open the file " USB Event.cws "
2. run the program and then insert or remove a USB device.

 **This document has been updated to meet the current required format for the NI Code Exchange.**

[johnswan]

The source code would be very helpfu

[oldvaxguy]

Where is the Source code??????

[nmira]

Sorry is possible have the source code?

I tried to use your exemplas but it didnt work?

thanks

[nmira]

Ok now i'ts working,I send my code for any changes?

Thanks

#include "windows.h" 

#include "dbt.h"

#include <cvirte.h>

#include <userint.h>

#include "sizepanel.h"

#include "toolbox.h"

static int panelHandle;

int flag;

DEV_BROADCAST_HDR * DeviceHeader;

int CVICALLBACK UsbMsgCallback   (int panelHandle, int message,

                                      unsigned int* wParam,

                                      unsigned int* lParam,

                                      void* callbackData);

int __stdcall WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                       LPSTR lpszCmdLine, int nCmdShow)

{

          int res=0;

          if (InitCVIRTE (hInstance, 0, 0) == 0)

                    return -1;          /* out of memory */

          if ((panelHandle = LoadPanel (0, "sizepanel.uir", PANEL)) < 0)

                    return -1;

          res = InstallWinMsgCallback (panelHandle, WM_DEVICECHANGE,

                                      UsbMsgCallback,

                                      VAL_MODE_INTERCEPT,

                                      NULL, &flag);

          DisplayPanel (panelHandle);

          RunUserInterface ();

          DiscardPanel (panelHandle);

          RemoveWinMsgCallback (panelHandle, WM_CLOSE);

          return 0;

}

int CVICALLBACK QuitCallback (int panel, int control, int event,

                    void *callbackData, int eventData1, int eventData2)

{

          switch (event)

          {

                    case EVENT_COMMIT:

                              QuitUserInterface (0);

                              break;

          }

          return 0;

}

int CVICALLBACK UsbMsgCallback (int panelHandle, int message,

                                    unsigned int* wParam, unsigned int* lParam,

                                    void* callbackData)

{ 

          int val=0;

          unsigned int size;

    unsigned int DeviceType;

switch(*wParam)

          {

          case DBT_DEVICEARRIVAL:

           GetCtrlVal(panelHandle,PANEL_LED,&val);

           SetCtrlVal(panelHandle,PANEL_LED,!val);

           DeviceHeader=( DEV_BROADCAST_HDR*)(*lParam);

           size=DeviceHeader->dbch_size;

           DeviceType=DeviceHeader->dbch_devicetype;

           SetCtrlVal(panelHandle,PANEL_NUMERIC,DeviceType);

           break;

          }

    return 0;

}

[HowardE]

I could really use this example - all that's here is the workspace. None of the code. ☹️

Does anyone have it?