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AirSim中图像API的应用解析Airsim图像获取保存的api 阅读详情

怎样用程序控制计算机开机、重起、注销？

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VPI与Matlab协同仿真：相干光通信接收端DSP算法全解析本文详细解析了如何利用VPI与Matlab协同仿真，构建完整的相干光通信接收端DSP算法处理闭环。重点介绍了从VPI导出数据后，在Matlab中实现时钟恢复、偏振解复用和载波相位估计等核心算法的步骤与原理，并阐述了如何通过误码率计算完成仿真验证，为相干光通信系统算法研究与验证提供了高效实用的方法。阅读详情

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zgvslch 2004-10-10

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Option Explicit

Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const EWX_SHUTDOWN As Long = 1
Private Const EWX_FORCE As Long = 4
Private Const EWX_REBOOT = 2
Private Const EWX_POWEROFF=8

Private Type LUID
UsedPart As Long
IgnoredForNowHigh32BitPart As Long
End Type

Private Type TOKEN_PRIVILEGES
PrivilegeCount As Long
TheLuid As LUID
Attributes As Long
End Type

'关闭系统的API
Private Declare Function ExitWindowsEx Lib "user32" (ByVal dwOptions As Long, _
ByVal dwReserved As Long) As Long
'获取当前进程的一个伪句柄
'只要当前进程需要一个进程句柄，就可以使用这个伪句柄。该句柄可以复制，但不可继承。不必调用CloseHandle函数来关闭这个句柄
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long

'以下为NT/2000中和权限相关的函数
'如果函数执行成功，返回非零。
Private Declare Function OpenProcessToken Lib "advapi32" (ByVal ProcessHandle As Long, _
ByVal DesiredAccess As Long, _
TokenHandle As Long) As Long
'查看权限的函数
Private Declare Function LookupPrivilegeValue Lib "advapi32" Alias "LookupPrivilegeValueA" _
(ByVal lpSystemName As String, _
ByVal lpName As String, lpLuid As LUID) As Long
'设置权限的函数
Private Declare Function AdjustTokenPrivileges Lib "advapi32" (ByVal TokenHandle As Long, _
ByVal DisableAllPrivileges As Long, _
NewState As TOKEN_PRIVILEGES, _
ByVal BufferLength As Long, _
PreviousState As TOKEN_PRIVILEGES, _
ReturnLength As Long) As Long

Sub ExitSystem()

Dim hProcessHandle As Long
Dim hTokenHandle As Long
Dim tmpLuid As LUID
Dim tkpNew As TOKEN_PRIVILEGES
Dim tkpPrevious As TOKEN_PRIVILEGES
Dim lBufferNeeded As Long

hProcessHandle = GetCurrentProcess()
Call OpenProcessToken(hProcessHandle, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, hTokenHandle)

Call LookupPrivilegeValue("", "SeShutdownPrivilege", tmpLuid)

tkpNew.PrivilegeCount = 1
tkpNew.TheLuid = tmpLuid
tkpNew.Attributes = SE_PRIVILEGE_ENABLED

lBufferNeeded = 0
Call AdjustTokenPrivileges(hTokenHandle, False, tkpNew, Len(tkpPrevious), tkpPrevious, lBufferNeeded)

Call ExitWindowsEx(EWX_SHUTDOWN, &O0)
'把EWX_SHUTDOWN（关机）换成 EWX_REBOOT（重启）、EWX_LOGOFF（注销）、EWX_POWEROFF（关闭电源）。EWX_FORCE是强制执行。
End Sub

programfish 2004-10-10

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Option Explicit

Private Declare Function SetSystemPowerState Lib "kernel32" (ByVal fSuspend As Long, ByVal fForce As Long) As Long
Private Enum HowExitConst
EWX_LOGOFF = 0
EWX_SHUTDOWN = 1
EWX_REBOOT = 2
EWX_FORCE = 4
EMX_POWEROFF = 8
End Enum
Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const ANYSIZE_ARRAY = 1
Private Type LUID
LowPart As Long
HighPart As Long
End Type
Private Type LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End Type
Private Type TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End Type
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function GetCurrentProcessId Lib "kernel32" () As Long
Private Declare Function LookupPrivilegevalue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, lpLuid As LUID) As Long
Private Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal DisableAllPrivileges As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, PreviousState As TOKEN_PRIVILEGES, ReturnLength As Long) As Long
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long

'98下
'Call ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE + EMX_POWEROFF, 0) '关机
'Call ExitWindowsEx(EWX_REBOOT, 0) '重启
'Call ExitWindowsEx(EWX_LOGOFF, 0) '注销

'2000/XP下
'Call Halt '关机
'Call Restart '重启
'Call Logon '注销

Private Sub AdjustToken()
On Error Resume Next
Dim hdlProcessHandle As Long
Dim hdlTokenHandle As Long
Dim tmpLuid As LUID
Dim tkp As TOKEN_PRIVILEGES
Dim tkpNewbutIgnored As TOKEN_PRIVILEGES
Dim lBufferNeeded As Long
hdlProcessHandle = GetCurrentProcess()
OpenProcessToken hdlProcessHandle, (TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY), hdlTokenHandle
LookupPrivilegevalue "", "SeShutdownPrivilege", tmpLuid
tkp.PrivilegeCount = 1
tkp.Privileges(0).pLuid = tmpLuid
tkp.Privileges(0).Attributes = SE_PRIVILEGE_ENABLED
AdjustTokenPrivileges hdlTokenHandle, False, tkp, Len(tkpNewbutIgnored), tkpNewbutIgnored, lBufferNeeded
End Sub

Private Sub Halt()
Dim method As HowExitConst
method = EWX_SHUTDOWN + EWX_FORCE + EMX_POWEROFF
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

Private Sub Logon()
Dim method As HowExitConst
method = EWX_LOGOFF
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

Private Sub Restart()
Dim method As HowExitConst
method = EWX_REBOOT
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

hanaichun 2004-10-10

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Public Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
Public Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByRef lpvParam As Any, ByVal fuWinIni As Long) As Long

ExitWindowsEx 1, 0 关机
ExitWindowsEx 0, 0 注销
ExitWindowsEx 2, 0 重启

AKillGodKillBuddha 2004-10-10

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tztz520 2004-10-10

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'模块中的代码(粘过去就可以了)
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" (lpVersionInformation As OSVERSIONINFO) As Long
Private Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128 'Maintenance string for PSS usage
osName As String '我自己加的, 操作系统的名称
End Type

Private Declare Function SetSystemPowerState Lib "kernel32" (ByVal fSuspend As Long, ByVal fForce As Long) As Long
Private Enum HowExitConst
EWX_LOGOFF = 0
EWX_SHUTDOWN = 1
EWX_REBOOT = 2
EWX_FORCE = 4
EMX_POWEROFF = 8
End Enum
Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const ANYSIZE_ARRAY = 1
Private Type LUID
LowPart As Long
HighPart As Long
End Type
Private Type LUID_AND_ATTRIBUTES
pLuid As LUID
Attributes As Long
End Type
Private Type TOKEN_PRIVILEGES
PrivilegeCount As Long
Privileges(ANYSIZE_ARRAY) As LUID_AND_ATTRIBUTES
End Type
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long
Private Declare Function GetCurrentProcess Lib "kernel32" () As Long
Private Declare Function GetCurrentProcessId Lib "kernel32" () As Long
Private Declare Function LookupPrivilegevalue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, lpLuid As LUID) As Long
Private Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal DisableAllPrivileges As Long, NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Long, PreviousState As TOKEN_PRIVILEGES, ReturnLength As Long) As Long
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long

Private Sub Halt()
Dim method As HowExitConst
method = EWX_SHUTDOWN + EWX_FORCE + EMX_POWEROFF
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

Private Sub Logon()
Dim method As HowExitConst
method = EWX_LOGOFF
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

Private Sub Restart()
Dim method As HowExitConst
method = EWX_REBOOT
Call AdjustToken
Call ExitWindowsEx(method, 0)
End Sub

Private Sub AdjustToken()
On Error Resume Next
Dim hdlProcessHandle As Long
Dim hdlTokenHandle As Long
Dim tmpLuid As LUID
Dim tkp As TOKEN_PRIVILEGES
Dim tkpNewbutIgnored As TOKEN_PRIVILEGES
Dim lBufferNeeded As Long
hdlProcessHandle = GetCurrentProcess()
OpenProcessToken hdlProcessHandle, (TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY), hdlTokenHandle
LookupPrivilegevalue "", "SeShutdownPrivilege", tmpLuid
tkp.PrivilegeCount = 1
tkp.Privileges(0).pLuid = tmpLuid
tkp.Privileges(0).Attributes = SE_PRIVILEGE_ENABLED
AdjustTokenPrivileges hdlTokenHandle, False, tkp, Len(tkpNewbutIgnored), tkpNewbutIgnored, lBufferNeeded
End Sub

Private Function GetWindowsVersion() As Long
Dim ver As OSVERSIONINFO
ver.dwOSVersionInfoSize = 148
GetVersionEx ver
GetWindowsVersion = ver.dwPlatformId
End Function

Public Sub CloseComputer() '关闭计算机
Dim ver As Long
ver = GetWindowsVersion()
If ver = 1 Then
Call ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE + EMX_POWEROFF, 0)
Else
Call Halt
End If
End Sub

Public Sub ResetComputerA() '重启计算机
Dim ver As Long
ver = GetWindowsVersion()
If ver = 1 Then
Call ExitWindowsEx(EWX_REBOOT, 0)
Else
Call Restart
End If
End Sub

Public Sub LogoutComputerA() '注销计算机
Dim ver As Long
ver = GetWindowsVersion()
If ver = 1 Then
Call ExitWindowsEx(EWX_LOGOFF, 0)
Else
Call Logon
End If
End Sub

'窗体中的代码(98,2000,XP下都可用)
Private Sub Command1_Click()'关闭计算机
CloseComputer
End Sub

Private Sub Command2_Click()'重启计算机
ResetComputerA
End Sub

Private Sub Command3_Click()'注销计算机
LogoutComputerA
End Sub

inbreak 2004-10-10

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Call ExitWindowsEx(EWX_SHUTDOWN, &O0)

应该是
ExitWindowsEx 8,0'正常关机
ExitWindowsEx 13,0'强制关机

如果不这样就会出现＂现在可以安全关闭计算机了！＂

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