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GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Jochen Arndt29-Nov-12 6:49
professionalJochen Arndt29-Nov-12 6:49 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Vaclav_29-Nov-12 8:23
MemberVaclav_29-Nov-12 8:23 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Jochen Arndt29-Nov-12 21:16
professionalJochen Arndt29-Nov-12 21:16 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Vaclav_30-Nov-12 2:43
MemberVaclav_30-Nov-12 2:43 
AnswerRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Cristian Amarie3-Dec-12 8:58
MemberCristian Amarie3-Dec-12 8:58 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Vaclav_3-Dec-12 12:39
MemberVaclav_3-Dec-12 12:39 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Cristian Amarie3-Dec-12 17:37
MemberCristian Amarie3-Dec-12 17:37 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Cristian Amarie3-Dec-12 18:52
MemberCristian Amarie3-Dec-12 18:52 
Ok, I found a piece of code inside of one of my projects (I wrote it some 2 years ago, and worked at that time).
C++
class devenum {
private:
	devenum();
	~devenum();
	devenum(const devenum&);
	devenum& operator=(const devenum&); 
public:
	static bool get(vector_t< pair_t< string_t<wchar_t>, string_t<wchar_t> > > & info) {
		HDEVINFO hdevinfo = ::SetupDiGetClassDevs(NULL, 0, 0, DIGCF_PRESENT | DIGCF_ALLCLASSES);
		if(hdevinfo == INVALID_HANDLE_VALUE) {
			return false;
		}
		SP_DEVINFO_DATA did = {0};
		did.cbSize = sizeof(did);
		for(DWORD i = 0; ::SetupDiEnumDeviceInfo(hdevinfo, i, &did); i++) {
			string_t<wchar_t> desc;
			if(getDescription(hdevinfo, &did, desc)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"description", desc);
			}
			string_t<wchar_t> hwid;
			if(getHardwareID(hdevinfo, &did, hwid)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  hardware-id", hwid);
			}
			string_t<wchar_t> clas;
			if(getClass(hdevinfo, &did, clas)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  class", clas);
			}
			string_t<wchar_t> classGuid;
			if(getClassGuid(hdevinfo, &did, classGuid)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  class-guid", classGuid);
			}
			string_t<wchar_t> address;
			if(getAddress(hdevinfo, &did, address)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  address", address);
			}
			string_t<wchar_t> busnumber;
			if(getBusNumber(hdevinfo, &did, busnumber)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  bus-number", busnumber);
			}
			string_t<wchar_t> bustypeguid;
			if(getBusTypeGuid(hdevinfo, &did, bustypeguid)) {
				info += pair_t< string_t<wchar_t>, string_t<wchar_t> >(L"  bus-type-guid", bustypeguid);
			}
//SPDRP_BUSTYPEGUID 
		}
		::SetupDiDestroyDeviceInfoList(hdevinfo);
		return true;
	}
	static bool getDescription(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getString(hdevinfo, pdid, SPDRP_DEVICEDESC, str);
	}
	static bool getHardwareID(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getString(hdevinfo, pdid, SPDRP_HARDWAREID, str);
	}
	static bool getClass(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getString(hdevinfo, pdid, SPDRP_CLASS, str);
	}
	static bool getClassGuid(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getString(hdevinfo, pdid, SPDRP_CLASSGUID, str);
	}
	static bool getAddress(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getDWORD(hdevinfo, pdid, SPDRP_ADDRESS, str);
	}
	static bool getBusNumber(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getDWORD(hdevinfo, pdid, SPDRP_BUSNUMBER, str);
	}
	static bool getBusTypeGuid(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, string_t<wchar_t>& str) {
		return getByte(hdevinfo, pdid, SPDRP_BUSTYPEGUID, str);
	}
	static bool getString(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, DWORD propid, string_t<wchar_t>& str) {
		DWORD type = 0;
		DWORD bufsiz = 0;
		LPWSTR pw = NULL;
		bool ok = true;
		do {
			if(::SetupDiGetDeviceRegistryPropertyW(hdevinfo, pdid, propid,
				&type, (PBYTE)pw, bufsiz, &bufsiz)) {
				ok = true;
				break;
			}
			if(::GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
				ok = true;
				if(pw != NULL) {
					::LocalFree(pw);
				}
				pw = (LPWSTR)LocalAlloc(LPTR, bufsiz * 2 + 1);
				if(pw == NULL) {
					break;
				}
			}
			else {
				ok = false;
				break;
			}
#pragma warning(disable: 4127)
		} while(true);
#pragma warning(default: 4127)
		if(ok) {
			if(pw != NULL) {
				str = pw;
			}
		}
		else {
			ok = true;
			str = L"";
		}
		if(pw != NULL) {
			::LocalFree(pw);
		}
		return ok;
	}
	static bool getDWORD(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, DWORD propid, string_t<wchar_t>& str) {
		DWORD type = 0;
		DWORD bufsiz = 0;
		DWORD v = 0;
		if(!::SetupDiGetDeviceRegistryPropertyW(hdevinfo, pdid, propid,
			&type, (PBYTE)&v, sizeof(DWORD), &bufsiz)) {
			str = L"";
			return true;
		}
		WCHAR sz[40] = L"";
		swprintf_s(sz, _countof(sz), L"0x%8.8x", v);
		str = sz;
		return true;
	}
	static bool getByte(HDEVINFO hdevinfo, SP_DEVINFO_DATA* pdid, DWORD propid, string_t<wchar_t>& str) {
		DWORD type = 0;
		DWORD bufsiz = 0;
		LPBYTE pb = NULL;
		bool ok = true;
		do {
			if(::SetupDiGetDeviceRegistryPropertyW(hdevinfo, pdid, propid,
				&type, (PBYTE)pb, bufsiz, &bufsiz)) {
				ok = true;
				break;
			}
			if(::GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
				ok = true;
				if(pb != NULL) {
					::LocalFree(pb);
				}
				pb = (LPBYTE)LocalAlloc(LPTR, bufsiz * 2);
				if(pb == NULL) {
					break;
				}
			}
			else {
				ok = false;
				break;
			}
#pragma warning(disable: 4127)
		} while(true);
#pragma warning(default: 4127)
		if(ok) {
			if(bufsiz == sizeof(GUID)) {
				GUID* guid = (GUID *)pb;
				WCHAR sz[40] = L"";
				memset(&sz[0], 0, _countof(sz) * sizeof(WCHAR));
				int rez = ::StringFromGUID2(*guid, sz, _countof(sz) - 1);
				if(rez != 0) {
					str = sz;
					ok = true;
				}
			}
		}
		else {
			ok = true;
			str = L"";
		}
		if(pb != NULL) {
			::LocalFree(pb);
		}
		return ok;
	}
};

The string_t is a string class, but you can replace it with std::wstring (or a LPWSTR* output variable as well). Same for vector_t, pair_t - you can replace them with STL counterparts std::vector, std::pair with minimal or no changes.

The getDescription is what you are looking for, which in turn calls getString - this is the core of business.
The usage - in my project - is:
C++
vector_t< pair_t< string_t<wchar_t>, string_t<wchar_t> > > info;
devenum::get(info);


I can post somewhere the entire project but the message form does not support attachments. Maybe I will post the entire project here as an article soon.

Regards,
Cristian
Nuclear launch detected

GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Vaclav_4-Dec-12 5:58
MemberVaclav_4-Dec-12 5:58 
GeneralRe: SetupDiGetDeviceRegistryProperty - buffer size? Pin
Cristian Amarie4-Dec-12 7:11
MemberCristian Amarie4-Dec-12 7:11 
QuestionShred a folder Pin
MehdiHazrati26-Nov-12 20:52
MemberMehdiHazrati26-Nov-12 20:52 
QuestionRe: Shred a folder Pin
David Crow27-Nov-12 3:57
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AnswerRe: Shred a folder Pin
MehdiHazrati27-Nov-12 4:26
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GeneralRe: Shred a folder Pin
Richard MacCutchan27-Nov-12 4:28
mveRichard MacCutchan27-Nov-12 4:28 
GeneralRe: Shred a folder Pin
MehdiHazrati27-Nov-12 4:50
MemberMehdiHazrati27-Nov-12 4:50 
GeneralRe: Shred a folder Pin
Richard MacCutchan27-Nov-12 5:05
mveRichard MacCutchan27-Nov-12 5:05 
GeneralRe: Shred a folder Pin
MehdiHazrati27-Nov-12 5:23
MemberMehdiHazrati27-Nov-12 5:23 
QuestionRe: Shred a folder Pin
David Crow27-Nov-12 6:04
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GeneralRe: Shred a folder Pin
Richard MacCutchan27-Nov-12 6:29
mveRichard MacCutchan27-Nov-12 6:29 
QuestionRe: Shred a folder Pin
David Crow27-Nov-12 6:03
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AnswerRe: Shred a folder Pin
jschell27-Nov-12 13:08
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GeneralRe: Shred a folder Pin
MehdiHazrati27-Nov-12 17:45
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GeneralRe: Shred a folder Pin
jschell28-Nov-12 8:33
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Questiondo-while did not work Pin
ho_khalaf26-Nov-12 19:36
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AnswerRe: do-while did not work Pin
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