AN2328

Coding example

3/7

return 0;

}

//Identify each HID interface

devInfoData.cbSize = sizeof(devInfoData);

DWORD MemberIndex = 0;

bool Result;

while (1)

{

try {

Result = SetupDiEnumDeviceInterfaces

(hDevInfo,0,&HidGuid,MemberIndex,&devInfoData);

if (!Result)

{

SetupDiDestroyDeviceInfoList(hDevInfo);

return (0); //No more devices found

}

MemberIndex++;

} catch (...) {

return 0;

}

//Get the Pathname of the current device

//detailData.cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);

detailData.cbSize = 5;

DWORD Reguired = 0;

try {

Result = SetupDiGetDeviceInterfaceDetail

(hDevInfo,&devInfoData,&detailData,256,&Reguired,NULL);

if (!Result)

continue;

} catch (...) {

continue;

}

//Get Handle for the current device

try {

DeviceHandle = CreateFile (detailData.DevicePath,

GENERIC_READ|GENERIC_WRITE,

FILE_SHARE_READ|FILE_SHARE_WRITE,

(LPSECURITY_ATTRIBUTES)NULL,

OPEN_EXISTING,

0,

NULL);

if (DeviceHandle == INVALID_HANDLE_VALUE)

{

CloseHandle(DeviceHandle);

continue;

}

} catch (...) {

continue;

}