Enumerate hardware devices

Download Source: Http://dl2.csdn.net/down4/20070627/27161251844.rar

HOWTO: Enumerating hardware devices by using the SETUPDI Call Function view products that this article applies to.

Article number	:	259695
Last modified	:	March 10, 2004
Amendment	:	2.0

This article was previously published under CHS259695 Overview to get a list of hardware devices installed in Windows 2000, an application can call SetupDiClass API functions.

Back to the top

More information The following code snippet shows how to display a list of all the hardware devices that have been installed:

#include <stdio.h> #include <windows.h> #include <setupapi.h> #include <devguid.h> #include    <regstr.h>int Main (int argc, char *argv[], char *envp[]) {Hdevinfo hdevinfo;    Sp_devinfo_data Deviceinfodata;    DWORD i;    Create a hdevinfo with all present devices. Hdevinfo = Setupdigetclassdevs (NULL, 0,//Enumerator 0, Digcf_present |        digcf_allclasses);        if (Hdevinfo = = Invalid_handle_value) {//Insert error handling here.    return 1;        }//Enumerate through all devices in Set.    deviceinfodata.cbsize = sizeof (Sp_devinfo_data); for (i=0;        Setupdienumdeviceinfo (Hdevinfo,i, &deviceinfodata); i++) {DWORD datat;        LPTSTR buffer = NULL;                DWORD buffersize = 0; Call function with NULL to begin with,//then use the returned buffer size//to Alloc the Buffer.    Keep calling until//success or an unknown failure.    while (!            Setupdigetdeviceregistryproperty (Hdevinfo, &deviceinfodata, Spdrp_devicedesc, &datat, (pbyte) buffer, buffersize, &buffersize)) {if (Get                LastError () = = Error_insufficient_buffer) {//change the BUFFER size.                if (buffer) localfree (buffer);            Buffer = LocalAlloc (lptr,buffersize);                } else {//Insert error handling here.            Break                }} printf ("result:[%s]/n", buffer);    if (buffer) localfree (buffer); } if (GetLastError ()!=no_error && GetLastError ()!=error_no_more_items) {//Insert        Error handling here.    return 1;        }//Cleanup setupdidestroydeviceinfolist (Hdevinfo); return 0;}

The following code snippet shows how to retrieve all the display adapter groups on the system:

    Hdevinfo = Setupdigetclassdevs (        (lpguid) &guid_devclass_display,        0,        0,        digcf_present);

The following code snippet shows how to retrieve all the device groups on the Peripheral Component Interconnect (PCI) bus:

    Hdevinfo = Setupdigetclassdevs (NULL,        regstr_key_pcienum,//enumerator        0,        digcf_present | digcf_allclasses);

Windows API functions that require device instance handles (such as the Config Manager Group for API functions) can use the setupdienumdeviceinfo function to return the D in the SP_DEVINFO_DATA structure The Evinst value.

http://blog.csdn.net/kl222/article/details/1668843

Enumerate hardware devices