如何编写Windows CE.net的usb驱动程序(3)

// 设置我们的特定的信息。
DriverSettings.dwVendorId = USB_NO_INFO;
DriverSettings.dwProductId = USB_NO_INFO;
DriverSettings.dwReleaseNumber = USB_NO_INFO;

DriverSettings.dwDeviceClass = USB_NO_INFO;
DriverSettings.dwDeviceSubClass = USB_NO_INFO;
DriverSettings.dwDeviceProtocol = USB_NO_INFO;

DriverSettings.dwInterfaceClass = 0x03; // HID
DriverSettings.dwInterfaceSubClass = 0x01; // boot device
DriverSettings.dwInterfaceProtocol = 0x02; // mouse

fRet = (*pRegisterId)(gcszMouseDriverId);

if(fRet)
{
fRet = (*pRegisterSettings)(szDriverLibFile,
gcszMouseDriverId, NULL, &DriverSettings);

if(!fRet)
{
//BUGBUG unregister the Client Driver’s ID
}
}
}
else
{
RETAILMSG(1,(TEXT("!USBMouse: Error getting USBD function pointers/r/n")));
}
FreeLibrary(hInst);
}
return fRet;
}
上述代码主要用于产生USB设备驱动程序需要的注册表信息，需要注意的是：USB设备驱动程序不使用标准的注册表函数，而是使用RegisterClientDriverID（）和RegisterClientSettings来注册相应的设备信息。

另外一个函数是USBUninstallDriver()函数，具体代码如下：
extern "C" BOOL
USBUnInstallDriver()
{
BOOL fRet = FALSE;
HINSTANCE hInst = LoadLibrary(L"USBD.DLL");

if(hInst)
{
LPUN_REGISTER_CLIENT_DRIVER_ID pUnRegisterId =
(LPUN_REGISTER_CLIENT_DRIVER_ID)
GetProcAddress(hInst, gcszUnRegisterClientDriverId);

LPUN_REGISTER_CLIENT_SETTINGS pUnRegisterSettings =
(LPUN_REGISTER_CLIENT_SETTINGS) GetProcAddress(hInst,
gcszUnRegisterClientSettings);

if(pUnRegisterSettings)
{
USB_DRIVER_SETTINGS DriverSettings;

DriverSettings.dwCount = sizeof(DriverSettings);
// 必须填入与注册时相同的信息。
DriverSettings.dwVendorId = USB_NO_INFO;
DriverSettings.dwProductId = USB_NO_INFO;
DriverSettings.dwReleaseNumber = USB_NO_INFO;

DriverSettings.dwDeviceClass = USB_NO_INFO;
DriverSettings.dwDeviceSubClass = USB_NO_INFO;
DriverSettings.dwDeviceProtocol = USB_NO_INFO;

DriverSettings.dwInterfaceClass = 0x03; // HID
DriverSettings.dwInterfaceSubClass = 0x01; // boot device
DriverSettings.dwInterfaceProtocol = 0x02; // mouse

fRet = (*pUnRegisterSettings)(gcszMouseDriverId, NULL,
&DriverSettings);
}

if(pUnRegisterId)
{
BOOL fRetTemp = (*pUnRegisterId)(gcszMouseDriverId);
fRet = fRet ? fRetTemp : fRet;
}
FreeLibrary(hInst);
}
return fRet;
}
此函数主要用于删除USBInstallDriver()时创建的注册表信息，同样的它使用自己的函数接口UnRegisterClientDriverID（）和UnRegisterClientSettings（）来做相应的处理。

另外一个需要处理的注册的监控通知函数USBDeviceNotifications（）：
extern "C" BOOL USBDeviceNotifications(LPVOID lpvNotifyParameter, DWORD dwCode,
LPDWORD * dwInfo1, LPDWORD * dwInfo2, LPDWORD * dwInfo3,
LPDWORD * dwInfo4)
{
CMouse * pMouse = (CMouse *)lpvNotifyParameter;

switch(dwCode)
{
case USB_CLOSE_DEVICE:
//删除相关的资源。
delete pMouse;
return TRUE;
}
return FALSE;
}