C / C++ / MFC

void CDeviceList::GetDeviceList(std::vector<string> &info)
{
	int i = 0;
	HRESULT hr;

    // enumerate all video capture devices
	CComPtr<ICreateDevEnum> pCreateDevEnum;
    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void**)&pCreateDevEnum);
    if (hr != NOERROR)
	{
		return;
	}

    CComPtr<IEnumMoniker> pEm;
    hr = pCreateDevEnum->CreateClassEnumerator( CLSID_VideoInputDeviceCategory, &pEm, 0);
    if (hr != NOERROR) 
	{
		return;
    }


    pEm->Reset();
    ULONG cFetched;
    IMoniker *pM;
	char* name = new char[255];
	char* loc = NULL;

    while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK)
    {
		IPropertyBag *pBag;
		hr = pM->BindToStorage(0,0,IID_IPropertyBag,(void**)&pBag);
		if(SUCCEEDED(hr)) 
		{
			VARIANT var;
			var.vt = VT_BSTR;
			hr = pBag->Read(L"FriendlyName", &var, NULL);
			wcstombs(name, var.bstrVal, 255);
			
			if (hr == NOERROR) 
			{
				loc = strstr(name,"(VFW)");
				if (loc==NULL)
				{
					info.push_back(name);
				}
			}
			SAFE_RELEASE(pBag);
		}
		SAFE_RELEASE(pM);
    }
	delete[] name;
}

#include "StdAfx.h"
#include "DeviceHandler.h"

CDeviceHandler::CDeviceHandler(void)
{
//get device list in a string vector devList
dList.GetDeviceList(devList);  
}

void CDeviceHandler::start(void)
{
startThread = TRUE;
CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadProc, this, 0, NULL);
}

void CDeviceHandler::stop(void)
{
startThread = FALSE;
}

int CDeviceHandler::ThreadProc(LPVOID lpParam)
{
	CDeviceHandler* ptr = (CDeviceHandler*) lpParam;

	while(ptr->startThread)
	{
		vector<string> nList;
		ptr->dList.GetDeviceList(nList);

		char * cDeviceName = new char[260];
	int status = ptr->CompareLists(ptr->devList,nList,cDeviceName);
		switch(status)
		{
		case 0:	{
			TRACE("No Device Arrived nor Removed\n");
			}
			break;
		case 1:	{
			TRACE("Device Removed \"%s\"\n",cDeviceName);
			}
			break;
		case 2:	{
			TRACE("Device Arrived \"%s\"\n",cDeviceName);
			}
			break;
		}
		delete[] cDeviceName;
		ptr->devList = nList;
		Sleep(500);
	}
	return 0;
}

ptr->dList.GetDeviceList(nList);

<br />
void FillBuffer(void)<br />
{<br />
	CString str;<br />
	<br />
	char Bit = 0;<br />
	char Byte = 0;<br />
	char Mask = 0;<br />
	char Buf = '0';<br />
<br />
<br />
	m_CardNumber.GetWindowTextA(str);<br />
	str.MakeUpper();<br />
	<br />
	for(int i = 0;i<sizeof(Card.Data);i++)<br />
	{<br />
		Card.Data[i] = 0x00; //make sure to clear buffer..<br />
	}<br />
<br />
	int MaxLength;<br />
<br />
	switch(PrevFormat)<br />
	{<br />
		case HEX: //Read in hex store in binary<br />
			{<br />
				MaxLength = 10;<br />
<br />
				if(str.GetLength() < 10)<br />
					MaxLength = str.GetLength();<br />
<br />
				for(int i = 0;<MaxLength;i++)<br />
				{<br />
					switch(str.GetAt(i))<br />
					{<br />
					case '0':<br />
						Mask = 0;<br />
						break;<br />
					case '1':<br />
						Mask = 1;<br />
						break;<br />
					case '2':<br />
						Mask = 2;<br />
						break;<br />
					case '3':<br />
						Mask = 3;<br />
						break;<br />
					case '4':<br />
						Mask = 4;<br />
						break;<br />
					case '5':<br />
						Mask = 5;<br />
						break;<br />
					case '6':<br />
						Mask = 6;<br />
						break;<br />
					case '7':<br />
						Mask = 7;<br />
						break;<br />
					case '8':<br />
						Mask = 8;<br />
						break;<br />
					case '9':<br />
						Mask = 9;<br />
						break;<br />
					case 'A':<br />
						Mask = 10;<br />
						break;<br />
					case 'B':<br />
						Mask = 11;<br />
						break;<br />
					case 'C':<br />
						Mask = 12;<br />
						break;<br />
					case 'D':<br />
						Mask = 13;<br />
						break;<br />
					case 'E':<br />
						Mask = 14;<br />
						break;<br />
					case 'F':<br />
						Mask = 15;<br />
						break;<br />
					};<br />
					if(Bit%2 == 0 || Bit == 0)<br />
					{<br />
						Mask = Mask << 4;<br />
					}<br />
					<br />
					Card.Data[Byte] = Card.Data[Byte]|Mask;<br />
			<br />
					Bit++;<br />
<br />
					if(Bit%2 == 0)<br />
					{<br />
						Byte++;<br />
					}<br />
<br />
<br />
				}<br />
				break; //Break HEX				<br />
			}<br />
		case BIN: // read binary string, store in binary buffer<br />
			{<br />
				MaxLength = 40;<br />
<br />
				if(str.GetLength() < 40)<br />
					MaxLength = str.GetLength();<br />
<br />
				for(int i = 0;i<MaxLength;i++)<br />
				{<br />
					Buf = str.GetAt(i);<br />
					Bit++;<br />
					<br />
					if(Buf == '1')<br />
					{<br />
						Mask = 1;<br />
						Mask = Mask << ((Bit % 8 > 0) ? ( 8 - (Bit % 8) ) : 0);<br />
						Card.Data[Byte] = Card.Data[Byte] | Mask;<br />
					}<br />
<br />
					if(Bit%8 == 0)<br />
					{<br />
						Byte++;<br />
					}<br />
				}<br />
				break; //Break BIN<br />
			}<br />
		case DEC:<br />
			{<br />
<br />
				//How to handle this?<br />
<br />
				break; //Break DEC<br />
			}<br />
                default:<br />
                                break;<br />
<br />
	};<br />
	<br />
<br />
}<br />
<br />