VC如何弹出U盘

发布网友发布时间：2022-05-29 21:07

共2个回答

热心网友时间：2024-11-25 00:34

bResult = DeviceIoControl(hDevice,
IOCTL_STORAGE_EJECT_MEDIA, //弹出U盘的具体命令。
NULL, 0, NULL, 0,&returned, NULL);

使用这个函数就可以弹出u盘

呵呵我现在也在用vc写弹出u盘程序可以交流下。

热心网友时间：2024-11-25 00:34

#include <windows.h>
#include <Setupapi.h>
#include <winioctl.h>
#include <cfgmgr32.h>
#include <regstr.h>
#include <initguid.h>
#include <stdio.h>
extern "C"
{
#include "hidsdi.h"
}
DEFINE_GUID(GUID_DEVINTERFACE_DISK, 0x53f56307L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
DEFINE_GUID(GUID_DEVINTERFACE_CDROM, 0x53f56308L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//-------------------------------------------------
DEVINST GetDrivesDevInstByDiskNumber(long DiskNumber, UINT DriveType);
//-------------------------------------------------
//-------------------------------------------------
int main(int argc, char* argv[])
{
if ( argc != 2 ) {
return 1;
}

//printf("in \n\n");

char DriveLetter = argv[1][0];
DriveLetter &= ~0x20; // uppercase

if ( DriveLetter < ''A'' || DriveLetter > ''Z'' )
{
return 1;
}

char szRootPath[] = "X:\\"; // "X:\"
szRootPath[0] = DriveLetter;

char szVolumeAccessPath[] = "\\\\.\\X:"; // "\\.\X:"
szVolumeAccessPath[4] = DriveLetter;

long DiskNumber = -1;

HANDLE hVolume = CreateFile(szVolumeAccessPath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);
if (hVolume == INVALID_HANDLE_VALUE) {
return 1;
}

STORAGE_DEVICE_NUMBER sdn;
DWORD dwBytesReturned = 0;
long res = DeviceIoControl(hVolume, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
if ( res ) {
DiskNumber = sdn.DeviceNumber;
}
CloseHandle(hVolume);

if ( DiskNumber == -1 ) {
return 1;
}

UINT DriveType = GetDriveType(szRootPath);

DEVINST DevInst = GetDrivesDevInstByDiskNumber(DiskNumber, DriveType);

if ( DevInst == 0 ) {
return 1;
}

ULONG Status = 0;
ULONG ProblemNumber = 0;
PNP_VETO_TYPE VetoType = PNP_VetoTypeUnknown;
WCHAR VetoNameW[MAX_PATH];
bool bSuccess = false;

res = CM_Get_Parent(&DevInst, DevInst, 0); // disk''s parent, e.g. the USB bridge, the SATA port....
res = CM_Get_DevNode_Status(&Status, &ProblemNumber, DevInst, 0);
bool IsRemovable = ((Status & DN_REMOVABLE) != 0);

for ( long tries=1; tries<=3; tries++ ) { // sometimes we need some tries...
VetoNameW[0] = 0;
if ( IsRemovable ) {
res = CM_Request_Device_EjectW(DevInst, &VetoType, VetoNameW, sizeof(VetoNameW), 0);
//res = CM_Request_Device_EjectW(DevInst, &VetoType, NULL, 0, 0); // with MessageBox or ''bubble''
} else {
res = CM_Query_And_Remove_SubTreeW(DevInst, &VetoType, VetoNameW, sizeof(VetoNameW), 0); // CM_Query_And_Remove_SubTreeA is not implemented under W2K!
}
bSuccess = (res==CR_SUCCESS && VetoType==PNP_VetoTypeUnknown);
if ( bSuccess ) {
break;
} else {
Sleep(200); // required to give the next tries a chance!
}
}

if ( bSuccess ) {
printf("Success\n\n");
return 0;
}

printf("failed\n");

printf("Result=0x%2X\n", res);

if ( VetoNameW[0] ) {
printf("VetoName=%ws)\n\n", VetoNameW);
}
return 1;
}
//-----------------------------------------------------------

//-----------------------------------------------------------
DEVINST GetDrivesDevInstByDiskNumber(long DiskNumber, UINT DriveType) {

GUID* guid;

switch (DriveType) {
case DRIVE_REMOVABLE:
//break;
case DRIVE_FIXED:
guid = (GUID*)(void*)&GUID_DEVINTERFACE_DISK;
break;
case DRIVE_CDROM:
guid = (GUID*)(void*)&GUID_DEVINTERFACE_CDROM;
break;
default:
return 0;
}

// Get device interface info set handle for all devices attached to system
HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

if (hDevInfo == INVALID_HANDLE_VALUE){
return 0;
}

// Retrieve a context structure for a device interface of a device
// information set.
DWORD dwIndex = 0;
SP_DEVICE_INTERFACE_DATA devInterfaceData = {0};
devInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
BOOL bRet = FALSE;

BYTE Buf[1024];
PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;
SP_DEVICE_INTERFACE_
希望能帮上忙。