过程分成3步：1: 列举出所有的HID设备，2: 循环读取HID设备数据，3: 向HID设备写数据，下面我把三部分的程序单独分开，方便大家学习！
在讲具体程序之前，先说一下visual studio的环境配置（我用的是2008版本）！
<下面程序需要包含DDK一部分头文件和库文件>
第一步：列举所有的HID设备：
m_ctllHIDdevices.ResetContent(); //这是MFC里面一个list控件，用来显示所有的HID设备的，如果你没有界面，可以不需要此行
UpdateData(FALSE); //更新界面
CString temp;
int Count = 0; //Total number of devices found
DWORD strSize=0,requiredSize=0;
BOOL result1,result2;
ULONG DeviceInterfaceDetailDataSize;
//定义一些变量，以后会用到
SP_DEVINFO_DATA DeviceInfoData;
SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
PSP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData;
//PSP_DEVICE_INTERFACE_DETAIL_DATA test;
//第一步：获取deviceID
GUID deviceId;
HidD_GetHidGuid(&deviceId);//第二步：获取设备信息
HDEVINFO handle;
handle = SetupDiGetClassDevs(&deviceId, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT); //Get only HID devices//第三步：对所有的设备进行枚举
//SetupDiEnumDeviceInterfaces();
result1=false; //定义一些变量
result2=false;
CString temp11="";
do
{
DeviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
result1 = SetupDiEnumDeviceInterfaces(
handle,
NULL, // IN PSP_DEVINFO_DATA DeviceInfoData, OPTIONAL
&deviceId,
Count,
&DeviceInterfaceData
);
//获得设备详细数据（初步）
SetupDiGetDeviceInterfaceDetail(handle,
&DeviceInterfaceData,
NULL,
0,
&strSize,
NULL);
requiredSize=strSize;
DeviceInterfaceDetailData=(PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(requiredSize);
DeviceInterfaceDetailData->cbSize=sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
DeviceInfoData.cbSize=sizeof(SP_DEVINFO_DATA);
//再次获得详细数据
result2=SetupDiGetDeviceInterfaceDetail(handle,
&DeviceInterfaceData,
DeviceInterfaceDetailData,
strSize,
&requiredSize,
&DeviceInfoData);
//获得设备路径（最重要的部分）
temp=DeviceInterfaceDetailData->DevicePath;
UpdateData(FALSE);
m_ctllHIDdevices.AddString(temp);
Count++;
} while (result1);
UpdateData(false);到这个时候为止，所有的设备路径，都会显示在窗口的listbox里面！
第二步：循环读取HID设备数据（根据用户提供的HID的vendorID和productID)，并且把字节解码成二进制，在MFC界面上用LED展示：
为了不影响主线程的运行，我把读取数据的操作，放在一个子线程里！每隔50ms去读取一次数据！
首先创建一个线程：
HANDLE hThread1;
bStopHID=false; //这个变量，以后用来停止线程
UpdateData(true); //更新界面，获取变量
UpdateData(false);
hThread1 = CreateThread(NULL,0,Thread_Enable_Read,(LPVOID)this, NULL, NULL);在线程的程序里：
CusbhidDlg *p = ( CusbhidDlg *)pvParam; //获取主窗口的指针，用来调用主窗口的变量和函数
p->UpdateData(true);
p->bStopHID=false;
CString temp;
CString DevicePath;
temp="";
int Count = 0; //Total number of devices found
DWORD strSize=0,requiredSize=0;
BOOL result1,result2;
ULONG DeviceInterfaceDetailDataSize;
SP_DEVINFO_DATA DeviceInfoData;
SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
PSP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData;
//PSP_DEVICE_INTERFACE_DETAIL_DATA test;
//1
GUID deviceId;
HidD_GetHidGuid(&deviceId);
int venderID=p->v_eVendorID; //从窗口里获取用户输入的VendorID
int productID=p->v_eProductID;//从窗口里获取用户输入的ProductID
unsigned char inbuffer[2]; //用来存放读取的数据，请在这里定义你自己需要的长度，我每次读一个字节进来
unsigned long numBytesReturned;
HIDD_ATTRIBUTES devAttr;
PHIDP_PREPARSED_DATA PreparsedData;
HIDP_CAPS Capabilities;
int readValue;
bool LED;
int flag=0;
//2
HDEVINFO handle;
handle = SetupDiGetClassDevs(&deviceId, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT); //Get only HID devices
int i=0;
int j=p->m_ctllHIDdevices.GetCount();
for (i=0;i<p->m_ctllHIDdevices.GetCount();i++)
{
p->m_ctllHIDdevices.GetText(i,temp);
DevicePath=temp;
//CreateFile是非常重要的一步，用来建立于HID通信的句柄
HANDLE hCom = CreateFile (
DevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING, 0,
NULL);
if (hCom == INVALID_HANDLE_VALUE)
{
//AfxMessageBox("Invalide Device Path...");
continue;
}
devAttr.Size=sizeof(HIDD_ATTRIBUTES);
if (!HidD_GetAttributes(hCom,&devAttr))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the parameters of the HID...");
return 0;
}
//temp.Format("Vendor ID: %d, Product ID:%d",devAttr.VendorID,devAttr.ProductID); //Compare with the Vendor ID and Product ID from Nakamura-san
//AfxMessageBox(temp);
if (!HidD_GetPreparsedData(hCom,&PreparsedData))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the Preparsed Data...");
return 0;
}
if(!HidP_GetCaps(PreparsedData,&Capabilities))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the Cap Data...");
return 0;
}
if (devAttr.VendorID == venderID && devAttr.ProductID == productID)
{
while(1)
{
result1 = ReadFile(hCom, &inbuffer[0], Capabilities.InputReportByteLength, &numBytesReturned, 0);
temp=inbuffer;
//p->m_eDataRead=CString(inbuffer);
//p->UpdateData(false);
if(!result1)
{
AfxMessageBox("Cannot Read Data...");
return 0;
}
readValue=inbuffer[1];
p->m_eDataRead.Format("%d",readValue);
//下面是我把数据从10进制转换成二进制，并且点亮LED (一个字节有8个bits,可以点亮8个LED
for (int k=0;k<8;k++)
{
flag=readValue%2;
readValue=readValue/2;
if (k==0)
{
if (flag==0)
p->m_sDynLED0.SwitchOff();
else
p->m_sDynLED0.SwitchOn();
}
else if (k==1)
{
if (flag==0)
p->m_sDynLED1.SwitchOff();
else
p->m_sDynLED1.SwitchOn();
}
else if (k==2)
{
if (flag==0)
p->m_sDynLED2.SwitchOff();
else
p->m_sDynLED2.SwitchOn();
}
else if (k==3)
{
if (flag==0)
p->m_sDynLED3.SwitchOff();
else
p->m_sDynLED3.SwitchOn();
}
else if (k==4)
{
if (flag==0)
p->m_sDynLED4.SwitchOff();
else
p->m_sDynLED4.SwitchOn();
}
else if (k==5)
{
if (flag==0)
p->m_sDynLED5.SwitchOff();
else
p->m_sDynLED5.SwitchOn();
}
else if (k==6)
{
if (flag==0)
p->m_sDynLED6.SwitchOff();
else
p->m_sDynLED6.SwitchOn();
}
else if (k==7)
{
if (flag==0)
p->m_sDynLED7.SwitchOff();
else
p->m_sDynLED7.SwitchOn();
}
}
p->UpdateData(false);
::Sleep(50);
//判断用户是否点击停止按钮，若是，则退出
if(p->bStopHID)
{
AfxMessageBox("stopped...");
return 0;
}
}
}
}
if (i==j)
{
AfxMessageBox("There is no such HID device...");
}
return 0;第三步：向HID设备写数据（根据用户提供的HID的vendorID和productID)，用户输入的是二进制数据：
与读的程序一样，唯一区别就是红色那部分！
UpdateData(true);
bStopHID=false;
CString temp;
CString DevicePath;
temp="";
int Count = 0; //Total number of devices found
DWORD strSize=0,requiredSize=0;
BOOL result1,result2;
ULONG DeviceInterfaceDetailDataSize;
SP_DEVINFO_DATA DeviceInfoData;
SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
PSP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData;
//PSP_DEVICE_INTERFACE_DETAIL_DATA test;
//1
GUID deviceId;
HidD_GetHidGuid(&deviceId);
int venderID=v_eVendorID;
int productID=v_eProductID;
unsigned char inbuffer[2];
unsigned long numBytesReturned;
HIDD_ATTRIBUTES devAttr;
PHIDP_PREPARSED_DATA PreparsedData;
HIDP_CAPS Capabilities;
int readValue;
bool LED;
int flag=0;
inbuffer[0]=0;
//把界面里的二进制转换成10进制
inbuffer[1]=m_eByte0*1+m_eByte1*2+m_eByte2*4+m_eByte3*8+m_eByte4*16+m_eByte5*32+m_eByte6*64+m_eByte7*128;
v_eDataToWrite=inbuffer[1];
UpdateData(false);
//2
HDEVINFO handle;
handle = SetupDiGetClassDevs(&deviceId, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT); //Get only HID devices
int i=0;
int j=m_ctllHIDdevices.GetCount();
for (i=0;i<m_ctllHIDdevices.GetCount();i++)
{
m_ctllHIDdevices.GetText(i,temp);
DevicePath=temp;
HANDLE hCom = CreateFile (
DevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING, 0,
NULL);
if (hCom == INVALID_HANDLE_VALUE)
{
//AfxMessageBox("Invalide Device Path...");
continue;
}
devAttr.Size=sizeof(HIDD_ATTRIBUTES);
if (!HidD_GetAttributes(hCom,&devAttr))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the parameters of the HID...");
return;
}
//temp.Format("Vendor ID: %d, Product ID:%d",devAttr.VendorID,devAttr.ProductID); //Compare with the Vendor ID and Product ID from Nakamura-san
//AfxMessageBox(temp);
if (!HidD_GetPreparsedData(hCom,&PreparsedData))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the Preparsed Data...");
return;
}
if(!HidP_GetCaps(PreparsedData,&Capabilities))
{
CloseHandle(hCom);
AfxMessageBox("Cannot get the Cap Data...");
return;
}
// Write File
if (devAttr.VendorID == venderID && devAttr.ProductID == productID)
{
result1 = WriteFile(hCom, inbuffer, 2, &numBytesReturned, NULL);
//temp=inbuffer;
//p->m_eDataRead=CString(inbuffer);
//p->UpdateData(false);
if(!result1)
{
AfxMessageBox("Cannot Write Data...");
return;
}
AfxMessageBox("Suncess...");
break;
}
}
if (i==j)
{
AfxMessageBox("There is no such HID device...");
}
return;