您不需要管理员权限即可设置您自己的互斥体的安全性。这是一个简单的演示应用程序,基本上让每个人/完全控制互斥体。
Option Explicit
Private Const STANDARD_RIGHTS_REQUIRED As Long = &HF0000
Private Const SYNCHRONIZE As Long = &H100000
Private Const MUTANT_QUERY_STATE As Long = &H1
Private Const MUTANT_ALL_ACCESS As Long = (STANDARD_RIGHTS_REQUIRED Or SYNCHRONIZE Or MUTANT_QUERY_STATE)
Private Const SECURITY_DESCRIPTOR_REVISION As Long = 1
Private Const DACL_SECURITY_INFORMATION As Long = 4
Private Declare Function CreateMutex Lib "kernel32" Alias "CreateMutexA" (lpMutexAttributes As Any, ByVal bInitialOwner As Long, ByVal lpName As String) As Long
Private Declare Function OpenMutex Lib "kernel32" Alias "OpenMutexA" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal lpName As String) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function InitializeSecurityDescriptor Lib "advapi32.dll" (pSecurityDescriptor As Any, ByVal dwRevision As Long) As Long
Private Declare Function SetSecurityDescriptorDacl Lib "advapi32.dll" (pSecurityDescriptor As Any, ByVal bDaclPresent As Long, pDacl As Any, ByVal bDaclDefaulted As Long) As Long
Private Declare Function SetKernelObjectSecurity Lib "advapi32.dll" (ByVal Handle As Long, ByVal SecurityInformation As Long, pSecurityDescriptor As SECURITY_DESCRIPTOR) As Long
Private Type SECURITY_DESCRIPTOR
Revision As Byte
Sbz1 As Byte
Control As Long
Owner As Long
Group As Long
pSacl As Long
pDacl As Long
End Type
Private Const MUTEX_NAME As String = "Global\20b70e57-1c2e-4de9-99e5-20f3961e6812"
Private m_hCurrentMutex As Long
Private Sub Form_Load()
Dim hMutex As Long
Dim uSec As SECURITY_DESCRIPTOR
hMutex = OpenMutex(MUTANT_ALL_ACCESS, 0, MUTEX_NAME)
If hMutex <> 0 Then
Call CloseHandle(hMutex)
MsgBox "Already running", vbExclamation
Unload Me
Exit Sub
End If
m_hCurrentMutex = CreateMutex(ByVal 0&, 1, MUTEX_NAME)
Call InitializeSecurityDescriptor(uSec, SECURITY_DESCRIPTOR_REVISION)
Call SetSecurityDescriptorDacl(uSec, 1, ByVal 0, 0)
Call SetKernelObjectSecurity(m_hCurrentMutex, DACL_SECURITY_INFORMATION, uSec)
End Sub
Private Sub Form_Unload(Cancel As Integer)
If m_hCurrentMutex <> 0 Then
Call CloseHandle(m_hCurrentMutex)
m_hCurrentMutex = 0
End If
End Sub