想弹出u盘，但是把usb鼠标也卸载了？

//这个其实是网上直接抄来的代码，大家能帮忙看下问题所在吗？

#include <windows.h>

#include <Setupapi.h>

#include <cfgmgr32.h>

#include <initguid.h>



#pragma   comment(lib,"setupapi.lib")



DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,

			0xA5DCBF10L,0x6530,0x11D2, 0x90,0x1F,0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);   

#define  GUID_CLASS_USB_DEVICE  GUID_DEVINTERFACE_USB_DEVICE



//绿色的地方好像没什么用，我就给屏蔽了。

int PopupAllUSBDisk()

{

	int Result = 0;

	DWORD   i;

	HDEVINFO   hDevInfo;

	SP_DEVINFO_DATA   DeviceInfoData;

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

	//   获取设备信息   

	hDevInfo = SetupDiGetClassDevs((LPGUID)&GUID_CLASS_USB_DEVICE,

		0,//   Enumerator

		0,

		DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

	if(hDevInfo == INVALID_HANDLE_VALUE)

	{

		//   查询信息失败

		//printf("ERROR   -   SetupDiGetClassDevs()");

		return 1;

	} 

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

	//   枚举每个USB设备

	DeviceInfoData.cbSize   =   sizeof(SP_DEVINFO_DATA);

	for(i=0;SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData);i++)

	{

		LPTSTR   buffer   =   NULL;   

		PVOID   buffer2   =   NULL;   

		DWORD   buffersize   =   0;   

		ULONG   len;   

		CONFIGRET       cr;   

		PNP_VETO_TYPE   pnpvietotype;   

		TCHAR   vetoname[MAX_PATH];   

		ULONG   ulStatus;   

		ULONG   ulProblemNumber;   

    

		cr = CM_Get_DevNode_Status(&ulStatus,

			&ulProblemNumber,

			DeviceInfoData.DevInst,

			0); 

		/*if(CR_SUCCESS == cr)

		{

			printf("OK   -   CM_Get_DevNode_Status()[%d]\n",   cr);   

			printf("OK   -   CM_Get_DevNode_Status()   sts   [%x]\n",   ulStatus);   

			printf("OK   -   CM_Get_DevNode_Status()   pro   [%x]\n",   ulProblemNumber);

		}

		else

		{

			printf("ERROR   -   CM_Get_DevNode_Status()[%d]\n",   cr);   

			printf("ERROR   -   CM_Get_DevNode_Status()[%d]\n",   GetLastError());   

		}*/

		if(CR_SUCCESS != cr)

			Result++;

		//   DN_DISABLEABLE   or   DN_REMOVABLE

		/*if((DN_DISABLEABLE & ulStatus) != 0)

		{

			Result++;

			//printf("HAS   -   DN_DISABLEABLE()[%x]\n",   DN_DISABLEABLE   &   ulStatus);

		}

		else

		{

			continue;

		}

		if((DN_REMOVABLE & ulStatus) != 0)

		{

			printf("HAS   -   DN_REMOVABLE()[%x]\n",   DN_REMOVABLE   &   ulStatus);

		}

		else

		{

			continue;

		}*/

		

		len   =   MAX_PATH;   

		//   pnpvietotype   =   PNP_VetoDevice;     

		cr   =   CM_Request_Device_EjectW(DeviceInfoData.DevInst,&pnpvietotype,vetoname,len,0);//没有气泡提示

		//cr   =   CM_Request_Device_EjectW(DeviceInfoData.DevInst,&pnpvietotype,NULL,0,0);//有气泡提示

		/*if(CR_SUCCESS == cr)

		{

			printf("OK   -   CM_Request_Device_Eject()[%d]\n",   cr);

		}

		else

		{

			printf("ERROR   -   CM_Request_Device_Eject()[%d]\n",   cr);

			printf("ERROR   -   CM_Request_Device_Eject()[%d]\n",   GetLastError());

		}*/

		if(CR_SUCCESS != cr)

			Result++;

	}

	

	if(GetLastError()!=NO_ERROR && GetLastError()!=ERROR_NO_MORE_ITEMS)

	{

		//   Insert   error   handling   here.

		return   1;

	}

	

	//     Cleanup

	SetupDiDestroyDeviceInfoList(hDevInfo);

	

	return   Result;