WINCE6下USB Serial和USB Mass Storage切换的代码

转滴

//--------------------------------------------------------------------------------------------------------------------------------------------------

最近发现有好多人在问WINCE下USB Serial和USB Mass Storage切换的问题；

既然做过，我就把程序给传上来，开源开源；

该程序是跑在WINCE6的板子上，其它地方我没有测试过；

不排版了；

// Udisk.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include <windows.h>

#include <commctrl.h>

#include <usbfntypes.h>

#include <usbfn.h>

#include <svsutil.hxx>

#include <storemgr.h>

HANDLE GetUfncontroller()

{

    HANDLE hUfn = NULL;

BYTE rgbGuidBuffer[sizeof(GUID) + 4];

LPGUID pguidBus = (LPGUID)rgbGuidBuffer;

LPCTSTR pszBusGuid = _T("E2BDC372-598F-4619-BC50-54B3F7848D35");

int iErr = _stscanf(pszBusGuid, SVSUTIL_GUID_FORMAT, SVSUTIL_PGUID_ELEMENTS(&pguidBus));

if (iErr == 0 || iErr == EOF)

return INVALID_HANDLE_VALUE;

DEVMGR_DEVICE_INFORMATION di;

memset(&di, 0, sizeof(di));

di.dwSize = sizeof(di);

    HANDLE hf = FindFirstDevice(DeviceSearchByGuid, pguidBus, &di);

if (hf != INVALID_HANDLE_VALUE)

{

   hUfn = CreateFile(di.szBusName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);

CloseHandle(hf);

}

else

{

   hUfn = INVALID_HANDLE_VALUE;

}

return hUfn;

}

int _tmain(int argc, _TCHAR* argv[])

{

HANDLE hDisk = NULL;

UFN_CLIENT_NAME uname;

UFN_CLIENT_INFO uinfo;

    DWORD dwReturn = 0;

_tcscpy(uname.szName, L"Mass_Storage_Class");

hDisk = GetUfncontroller();

if (hDisk == INVALID_HANDLE_VALUE)

{

   RETAILMSG(1, (TEXT("invalid usb handle, error = %d/r/n"), GetLastError()));

return 0;

}

if (DeviceIoControl(hDisk, IOCTL_UFN_GET_CURRENT_CLIENT, NULL, 0, &uinfo, sizeof(uinfo), &dwReturn, 0) && (dwReturn == sizeof(uinfo)))

{

if (_tcscmp(L"Mass_Storage_Class", uinfo.szName) == 0)

_tcscpy(uname.szName, L"Serial_Class");

}

if (!DeviceIoControl(hDisk, IOCTL_UFN_CHANGE_CURRENT_CLIENT, &uname, sizeof(uname), NULL, 0, NULL, NULL))

{

RETAILMSG(1, (TEXT("deviceiocontrol failed, error = %d/r/n"), GetLastError()));

return 0;

}

return 0;

}

 

本文来自优快云博客，转载请标明出处：http://blog.youkuaiyun.com/bearbrotherji/archive/2009/07/17/4357137.aspx