vc++实现控制USB设备启用与否

#include <WINDOWS.H>
#include <TCHAR.H>
#include <SETUPAPI.H>
//#include <SHLWAPI.H>
#pragma comment(lib, "setupapi.lib")
//#pragma comment(lib, "shlwapi.lib")
HDEVINFO hDevInfo = NULL;
// 出错信息
void FormatMSG(DWORD dwError, LPTSTR * o)
{
LPTSTR oo=(LPTSTR)o;
BOOL bOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError,
MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED), oo, 0, NULL);
if(!bOk) //将**变成*2007 /01 /10
{ //新建的字符串由oo指向。
HMODULE hDll = LoadLibraryEx(_T("netmsg.dll"),NULL,DONT_RESOLVE_DLL_REFERENCES);
if(NULL != hDll)
{
FormatMessage(FORMAT_MESSAGE_FROM_HMODULE |
FORMAT_MESSAGE_FROM_SYSTEM,hDll,
dwError,
MAKELANGID(LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED),
(LPTSTR)o,0, NULL);
FreeLibrary(hDll);
}
}
}
BOOL ChangeStatus(DWORD NewStatus, DWORD SelectedItem, HDEVINFO hDevInfo)
{
LPTSTR lpszMsg = NULL;
HCURSOR hCursor = NULL;
try
{
SP_PROPCHANGE_PARAMS PropChangeParams = {sizeof(SP_CLASSINSTALL_HEADER)};
SP_DEVINFO_DATA DeviceInfoData = {sizeof(SP_DEVINFO_DATA)};
hCursor = SetCursor(LoadCursor(NULL, IDC_WAIT));
// Get a handle to the Selected Item.
if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, &DeviceInfoData))
{
FormatMSG(GetLastError(), &lpszMsg);
throw lpszMsg;
}
// Set the PropChangeParams structure.
PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
PropChangeParams.Scope = DICS_FLAG_GLOBAL;
PropChangeParams.StateChange = NewStatus;
if (!SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER *)&PropChangeParams,
sizeof(PropChangeParams)))
{
FormatMSG(GetLastError(), &lpszMsg);
throw lpszMsg;
}

// Call the ClassInstaller and perform the change.
if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&DeviceInfoData))
{
FormatMSG(GetLastError(), &lpszMsg);
throw lpszMsg;
}
SetCursor(hCursor);
return TRUE;
}
catch (TCHAR * pszError)
{
SetCursor(hCursor);
::MessageBox(NULL,pszError,_T("提示"),MB_OK);
if (NULL != lpszMsg)
{
LocalFree((HLOCAL)lpszMsg);
}
return FALSE;
}
}

// 这些设备的启用和禁用主要有此函数实现
// 参数说明,nStatus 可取3个值，-1 ：啥也不做
// 0 禁用设备，1启用设备。
// nIndex用于控制是对光驱，软驱还是对USB启用或禁用
// 也是可取3个值，0 代表软驱，1 代表光驱
// 2 代表USB
// 譬如要对光驱实现禁用，可以这样调用此函数
// ControlDisk(0, 1);
BOOL ControlDisk(int nStatus, int nIndex)
{
if (-1 == nStatus)
{
return FALSE;
}
LPTSTR lpszMsg = NULL;
try
{
TCHAR * GUIDString = NULL;
GUID guid;
ZeroMemory(&guid, sizeof(GUID));
switch(nIndex)
{
case 0: // 0 代表软驱
GUIDString = _T("4D36E980-E325-11CE-BFC1-08002BE10318");
UuidFromString((unsigned char *)GUIDString, &guid);
break;
case 1: // 1 代表光驱
GUIDString = _T("4D36E965-E325-11CE-BFC1-08002BE10318");
UuidFromString((unsigned char *)GUIDString, &guid);
break;
case 2: // 2 代表USB
GUIDString = _T("36FC9E60-C465-11CF-8056-444553540000");
UuidFromString((unsigned char *)GUIDString, &guid);
break;
}
hDevInfo = SetupDiGetClassDevs(&guid,NULL,NULL,DIGCF_PRESENT);
if (INVALID_HANDLE_VALUE != hDevInfo)
{lpszMsg="hahazx";
FormatMSG(GetLastError(), &lpszMsg);

throw lpszMsg;
}
DWORD i;
SP_DEVINFO_DATA DeviceInfoData;
ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA));
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); ++i)
{
if (1 == nStatus)
{::MessageBox(NULL,"启用","correct",MB_OK);
ChangeStatus(DICS_ENABLE, i, hDevInfo);
}
else if (0 == nStatus)
{::MessageBox(NULL,"禁用","error",MB_OK);
ChangeStatus(DICS_DISABLE, i, hDevInfo);
}
}
// 释放 device information set
return SetupDiDestroyDeviceInfoList(hDevInfo);
}
catch (TCHAR * pszError)
{
::MessageBox(NULL,pszError,_T("提示"),MB_OK);
if (NULL != lpszMsg)
{
LocalFree((HLOCAL)lpszMsg);
}
return FALSE;
}
return FALSE;
}
void main()
{
ControlDisk(1, 2);
}

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/yincheng01/archive/2009/06/05/4244982.aspx