Win32 programming-use setupdi to call a function to enumerate hardware devices

To obtain the list of hardware devices installed in Windows 2000 Program Yes Setupdi Class API functions.

BelowCodeSection shows how to display the list of all installed hardware devices:

# Include <stdio. h>
# Include <windows. h>
# Include <setupapi. h>
# Include <devguid. h>
# Include <regstr. h>

# Pragma comment (Lib, "setupapi. lib ")

Int main (INT argc, char * argv [], char * envp [])
{
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,
// Then use the returned buffer size
// To alloc the buffer. keep calling
// Success or an unknown failure.
//
While (! Setupdigetdeviceregistryproperty (
Hdevinfo,
& Deviceinfodata,
Spdrp_devicedesc,
& Datat,
(Pbyte) buffer,
Buffersize,
& Buffersize ))
{
If (getlasterror () =
Error_insufficient_buffer)
{
// Change the buffer size.
If (buffer) localfree (buffer );
Buffer = (lptstr) 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 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 device groups on the Peripheral Component Interconnect (PCI) Bus: hdevinfo = setupdigetclassdevs (null,
Regstr_key_pcienum, // enumerator
0,
Digcf_present | digcf_allclasses );