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CDeviceTree

, 2 Apr 2004
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A tree control to show installed devices like Device Manager.

Sample Image - DeviceTree.jpg

Introduction

Here we want to show installed devices of our PC like what a Device Manager shows. In Device Manager, installed devices are shown in specific categories like: DVD/CD-ROM Drives or Floppy disk controllers. In my previous article Enumerate Installed Devices Using Setup API, I show you how we can list all devices. In this article, installed devices are shown in a tree in their categories, like Device Manager.

For this purpose, I created a new class called CDeviceTree that is inherited from CTreeCtrl. Using of the new class is very simple.

How to use

First of all add DeviceTree.h and DeviceTree.cpp files to your project. Then in your dialog resource editor, add new Tree control (figure 2 shows it). Rename the control ID to your desired ID, for example IDC_DEVICE_TREE. Run class wizard (Ctrl+W) and add new member variable with variable type CDeviceTree. (If CDeviceTree does not appear in combo box, choose CTreeCtrl, then in your dialog header file, rename CTreeCtrl to CDeviceTree). Name it as m_DeviceTree.

Figure 2 - Add new tree control to dialog resource

Figure 3- Add member variable with variable type CDeviceTree.

If CDeviceTree does not appear in Variable type combo box, simply choose CTreeCtrl, then rename it to CDeviceTree in your dialog header file. For example:

CTreeCtrl   m_DeviceTree;

to:

CDeviceTree   m_DeviceTree;

Don't forget to include DeviceTree.h to your dialog header file. OK, now everything is ready to compile!

CDeviceTree Class

The CDeviceTree class contains only one public member function: EnumDevices(). The function is responsible for enumerating all of the installed devices in their categories. The user must only use this function to see the tree of devices. The best way for this is OnInitDialog() member function of main dialog. In other hand:

BOOL CYourDialog::OnInitDialog()
{
    CDialog::OnInitDialog();

    // Set the icon for this dialog.  The framework does this automatically
    //  when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);         // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon
    
    // TODO: Add extra initialization here
    m_DeviceTree.EnumDevices();   //CDeviceTree will enumerate all of devices
    
    return TRUE;  // return TRUE  unless you set the focus to a control
}

The class definition is as below:

#ifndef _DEVICE_TREE_H_
#define _DEVICE_TREE_H_

#include "SetupAPI.h"
#include "cfgmgr32.h"

class CDeviceTree : public CTreeCtrl
{
// Construction
public:
    CDeviceTree();

// Implementation
public:
    void EnumDevices();
    virtual ~CDeviceTree();

private:
    int EnumDevices(int index, TCHAR* DeviceClassName, TCHAR* DeviceName);
    int EnumDeviceClasses(int index, TCHAR* DeviceClassName, 
              TCHAR* DeviceClassDesc, BOOL* DevicePresent, int* ClassImage);
    
    SP_CLASSIMAGELIST_DATA m_ImageListData;
    CImageList m_ImageList;
    
    // Generated message map functions
protected:
    //{{AFX_MSG(CDeviceTree)
        // NOTE - the ClassWizard will add and remove member functions here.
    //}}AFX_MSG

    DECLARE_MESSAGE_MAP()
};

#endif // _DEVICE_TREE_H_

As you see, the application shows devices like Device Manager does (Figure 4):

Enjoy!

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

A. Riazi
CEO Misbah3Com
Iran (Islamic Republic Of) Iran (Islamic Republic Of)
I was born in Shiraz, a very beautiful famous city in Iran. I started programming when I was 12 years old with GWBASIC. Since now, I worked with various programming languages from Basic, Foxpro, C/C++, Visual Basic, Pascal to MATLAB and now Visual C++.
I graduated from Iran University of Science & Technology in Communication Eng., and now work as a system programmer for a telecommunication industry.
I wrote several programs and drivers for Synthesizers, Power Amplifiers, GPIB, GPS devices, Radio cards, Data Acqusition cards and so many related devices.
I'm author of several books like Learning C (primary and advanced), Learning Visual Basic, API application for VB, Teach Yourself Object Oriented Programming (OOP) and etc.
I'm winner of January, May, August 2003 and April 2005 best article of month competetion, my articles are:

You can see list of my articles, by clicking here


Comments and Discussions

 
GeneralMy vote of 5 Pinmembermanoj kumar choubey26-Feb-12 19:49 
QuestionMicrosoft Kernel System Audio Device? Pinmembertigerset9-Dec-10 21:58 
GeneralCompilation error Pinmemberagsuresh7-Jul-08 22:35 
Hi!
 
The program is great. But when I try to compile it I get the following error.
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : error C2146: syntax error : missing ';' before identifier 'RES_DES'
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : fatal error C1004: unexpected end of file found
DeviceTreeDialog.cpp
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : error C2146: syntax error : missing ';' before identifier 'RES_DES'
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : fatal error C1004: unexpected end of file found
DeviceTreeDlg.cpp
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : error C2146: syntax error : missing ';' before identifier 'RES_DES'
c:\program files\microsoft visual studio\vc98\include\cfgmgr32.h(121) : fatal error C1004: unexpected end of file found
 
What could be the problem?
 
regards
suresh
QuestionA Question PinmemberZhang.W23-Sep-07 23:25 
QuestionHow to compile the source code for x64 system? Pinmembermadracer26-Dec-05 23:39 
QuestionHow to modify the source code to support win9x/winme? Pinmembersams_wang23-Oct-05 23:21 
AnswerRe: How to modify the source code to support win9x/winme? PinmemberA. Riazi23-Oct-05 23:55 
QuestionDevice Tree in VB6 ? PinmemberAPI Novice22-Oct-05 2:36 
AnswerRe: Device Tree in VB6 ? PinmemberA. Riazi22-Oct-05 23:46 
GeneralQuestion PinsussDong Hoon Lee13-Jul-05 2:57 
GeneralRe: Question PinsussDong Hoon Lee13-Jul-05 22:38 
GeneralRe: Question PinmemberNeeranjan7-Dec-07 1:04 
Generalhelp me PinmemberMOHAMMAD KAKAVAND25-Jun-05 10:28 
GeneralRe: help me PinmemberA. Riazi25-Jun-05 20:34 
GeneralMistakes at compilation Pinmembernina194710-Mar-05 3:29 
GeneralRe: Mistakes at compilation PinmemberA. Riazi10-Mar-05 23:44 
GeneralRe: Mistakes at compilation Pinmemberqueylai5-Mar-12 0:08 
GeneralDevices by connection... PinmemberIanTJ24-Feb-05 7:27 
GeneralRe: Devices by connection... PinmemberA. Riazi25-Feb-05 5:56 
GeneralRe: Devices by connection... PinmemberIanTJ25-Feb-05 8:58 
GeneralDelay... PinmemberRobert Buldoc27-Oct-04 12:29 
GeneralRe: Delay... PinmemberA. Riazi27-Oct-04 21:38 
GeneralRe: Delay... PinmemberTam2Lana13-Oct-06 7:50 
GeneralMore like device manager PinmemberdaDude22-Sep-04 5:56 
GeneralRe: More like device manager PinmemberA. Riazi23-Sep-04 1:15 
Generalyour name always catches my eyes Pinmemberedger8-Apr-04 15:59 
GeneralRe: your name always catches my eyes PinmemberA. Riazi8-Apr-04 23:20 
GeneralRe: your name always catches my eyes Pinmemberggstudy21-Mar-05 14:14 
GeneralRe: your name always catches my eyes PinmemberA. Riazi21-Mar-05 20:25 
GeneralMissing cfg.h PinmemberHal Director4-Apr-04 13:14 
GeneralRe: Missing cfg.h PinmemberA. Riazi5-Apr-04 1:41 
GeneralRe: Missing cfg.h PinmemberHal Director6-Apr-04 10:55 
GeneralRe: Missing cfg.h PinmemberA. Riazi8-Apr-04 5:02 
GeneralRe: Missing cfg.h PinmemberCristian Andreon8-Apr-04 20:37 
GeneralRe: Missing cfg.h PinmemberA. Riazi8-Apr-04 23:17 
GeneralRe: Missing cfg.h PinmemberHal Director9-Apr-04 6:33 
GeneralRe: Missing cfg.h PinmemberA. Riazi9-Apr-04 6:46 
GeneralRe: Missing cfg.h PinmemberOle Martin Brynildsen29-Mar-05 21:27 
GeneralRe: Missing cfg.h Pinmembereyebex27-Mar-06 3:56 
GeneralLooks nice! PinmemberHans Dietrich3-Apr-04 2:24 
GeneralRe: Looks nice! PinmemberA. Riazi3-Apr-04 2:52 
GeneralRe: Looks nice! PinmemberHans Dietrich3-Apr-04 3:18 
GeneralRe: Looks nice! Pinmemberdiilbert4-Apr-04 7:09 

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