Do you need to Monitor Devices in your Machine from your Delphi Application? Don’t know where to start with ? Don’t worry. MiTec’s System Information Management Suite’s component helps to monitor your USB, Bluetooth devices or TV/monitor connection/disconnection, volumes mount/unmount, CD/DVD insert/eject with less code and we will learn how to use MiTeC_DeviceMonitor in this blog post.
Platforms: Windows.
Installation Steps:
You can easily install this Component Suite from GetIt Package Manager. The steps are as follows.
- Navigate In RAD Studio IDE->Tools->GetIt Package Manager->select Components in Categories->Components->Trail -MiTec system Information Component Suite 14.3 and click Install Button.
- Read the license and Click Agree All. An Information dialog saying ‘Requires a restart of RAD studio at the end of the process. Do you want to proceed? click yes and continue.
- It will download the plugin and installs it. Once installed Click Restart now.
How to run the Demo app:
- Navigate to the System Information Management Suite trails setup, Demos folder which is installed during Get It installation e.g) C:UsersDocumentsEmbarcaderoStudio21.0CatalogRepositoryMiTeC-14.3DemosDelphi8
- Open the DeviceMonitor project in RAD studio 10.4.1 compile and Run the application.
- This Demo App shows how to monitor the USB Devices, Storage Devices upon connection and disconnection to your machine.
Components used in MSIC DeviceMonitor App:
- TMiTeC_DeviceMonitor: Catches USB, Bluetooth devices or TV/monitor connection/disconnection, volumes mount/unmount, CD/DVD insert/eject and other events from other devices. It has events such as OnDeviceConnect, OnDeviceDisconnect, OnMessage, OnVolumeConnect, OnVolumeDisconnect to monitor the devices.
- TListBox to list the event messages upon device gets connected and disconnected other message notifications.
- TMemo to highlight the line from the list box separately for easy reading.
- TButton to save/clear the messages in the list box and for closing.
Implementation Details:
- An instance DeviceMonitor of TMiTeC_DeviceMonitor is created. During DeviceMonitorDeviceConnect, it identifies the device desc class by matching the GUID and logs the message according to the device connected.
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procedure Twnd_dm_Main.DeviceMonitorDeviceConnect(Sender: TObject; DeviceDesc: TDeviceDesc); var t: Integer; g: TGUID; begin if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_USB_DEVICE)) then g:=GUID_DEVCLASS_USB else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_DISK)) then g:=GUID_DEVCLASS_DISKDrive else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_WPD)) then g:=GUID_DEVCLASS_WPD else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_REMOVABLE_STORAGE)) then g:=GUID_DEVCLASS_FDC else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_VOLUME)) then g:=GUID_DEVCLASS_VOLUME else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_BLUETOOTH)) then g:=GUID_DEVCLASS_BLUETOOTH else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_NET)) then g:=GUID_DEVCLASS_NET else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_MOUSE)) then g:=GUID_DEVCLASS_MOUSE else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_KEYBOARD)) then g:=GUID_DEVCLASS_KEYBOARD else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_DISPLAY_ADAPTER)) then g:=GUID_DEVCLASS_DISPLAY else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_MONITOR)) then g:=GUID_DEVCLASS_MONITOR else g:=StringToGUID(DeviceDesc.GUID); //AddLog('GUID: '+DeviceDesc.GUID); SetupDiGetClassImageIndex(spid,g,t); if DeviceDesc.Name<>'' then AddLog(Format('%s (%s) connected.',[DeviceDesc.Location,DeviceDesc.Name]),t) else if DeviceDesc.Description<>'' then AddLog(Format('%s (%s) connected.',[DeviceDesc.Location,DeviceDesc.Description]),t) else if DeviceDesc.SymbolicName<>'' then AddLog(Format('Device (%s) connected.',[ExtractFilename(Uppercase(DeviceDesc.SymbolicName))]),t) else AddLog('Device connected.',t); end; |
- Upon disconnecting, it identifies the device desc class by matching the GUID and logs the message according to the device disconnected.
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procedure Twnd_dm_Main.DeviceMonitorDeviceDisconect(Sender: TObject; DeviceDesc: TDeviceDesc); var t: Integer; g: TGUID; begin if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_USB_DEVICE)) then g:=GUID_DEVCLASS_USB else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_DISK)) then g:=GUID_DEVCLASS_DISKDRIVE else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_WPD)) then g:=GUID_DEVCLASS_WPD else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_REMOVABLE_STORAGE)) then g:=GUID_DEVCLASS_FDC else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_VOLUME)) then g:=GUID_DEVCLASS_VOLUME else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_BLUETOOTH)) then g:=GUID_DEVCLASS_BLUETOOTH else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_NET)) then g:=GUID_DEVCLASS_NET else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_MOUSE)) then g:=GUID_DEVCLASS_MOUSE else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_KEYBOARD)) then g:=GUID_DEVCLASS_KEYBOARD else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_DISPLAY_ADAPTER)) then g:=GUID_DEVCLASS_DISPLAY else if SameText(DeviceDesc.GUID,GUIDToString(GUID_DEVINTERFACE_MONITOR)) then g:=GUID_DEVCLASS_MONITOR else g:=StringToGUID(DeviceDesc.GUID); //AddLog('GUID: '+DeviceDesc.GUID); SetupDiGetClassImageIndex(spid,g,t); if DeviceDesc.Name<>'' then AddLog(Format('%s (%s) disconnected.',[DeviceDesc.Location,DeviceDesc.Name]),t) else if DeviceDesc.Description<>'' then AddLog(Format('%s (%s) disconnected.',[DeviceDesc.Location,DeviceDesc.Description]),t) else if DeviceDesc.SymbolicName<>'' then AddLog(Format('Device (%s) disconnected.',[DeviceDesc.SymbolicName]),t) else AddLog('Device disconnected.',t); end; |
- To monitor device custom event messages,
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procedure Twnd_dm_Main.DeviceMonitorMessage(Sender: TObject; Msg: TMessage); var m,d: string; begin if not cbxAll.Checked then Exit; m:=GetMessageType(Msg.wParam); case Msg.wParam of DBT_DEVICEARRIVAL..DBT_CUSTOMEVENT: begin d:=GetDeviceType(PDevBroadcastHdr(Msg.lParam).dbch_devicetype); case PDevBroadcastHdr(Msg.lParam).dbch_devicetype of DBT_DEVTYP_OEM, DBT_DEVTYP_DEVNODE, DBT_DEVTYP_PORT: AddLog(Format('*%s: %s',[m,d])); DBT_DEVTYP_VOLUME: AddLog(Format('*%s: %s - 0x%x - 0x%x',[m,d, PDevBroadcastVolume(Msg.lParam).dbcv_unitmask, PDevBroadcastVolume(Msg.lParam).dbcv_flags])); DBT_DEVTYP_NET: AddLog(Format('*%s: %s - 0x%x',[m,d,PDevBroadcastNet(Msg.lParam).dbcn_resource])); DBT_DEVTYP_DEVICEINTERFACE: try AddLog(Format('*%s: %s - %s (Class: %s)',[m,d, string(PChar(@PDevBroadcastDeviceInterface(Msg.lParam).dbcc_name)), GUIDToString(PDevBroadcastDeviceInterface(Msg.lParam).dbcc_classguid)])); except AddLog(Format('*%s: %s',[m,d])); end; DBT_DEVTYP_HANDLE: AddLog(Format('*%s - %s - %s',[m,d,GUIDToString(PDevBroadcastHandle(Msg.lParam).dbch_eventguid)])); else AddLog(Format('*%s: %s',[m,d])); end; end; else AddLog(Format('*%s: 0x%x',[m,Msg.lParam])); end; end; |
Developers can use this MiTeC Component suite and able to monitor the devices with writing less code.
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