我已取得一个进程ID，接下来怎么取得它的句柄？在线等

[monica8361]

我知道是用这个API
Private Declare Function OpenProcess Lib "kernel32" Alias "OpenProcess" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long

可按例子所说的来用，返回的值永远都是0，这是为什么

[lihonggen0]

phnd = OpenProcess(PROCESS_ALL_ACCESS , False, pid)
如果是服务进程,你需要有调试程序的权限

[GetWindowPos]

这是因为你抄了那些不负责任的例程的原因，我以前我想了很久这个问题，原因出自在参数的定义上

Private Const PROCESS_ALL_ACCESS = &H1F0FFF '极为重要的一项！！！

你一定是没有定义参数的值才会导致返回0

[lihonggen0]

参考：

'Remark: If you're using VB4 or VB5, you should first uncomment
' the Replace function (on the end of the code)

'In a form
Private Sub Form_Load()
'Code submitted by Roger Taylor
'enumerate all the different explorer.exe processes
GetProcesses "explorer.exe"
End Sub

'In a module

Public Declare Function GetProcessMemoryInfo Lib "PSAPI.DLL" (ByVal hProcess As Long, ppsmemCounters As PROCESS_MEMORY_COUNTERS, ByVal cb As Long) As Long
Public Declare Function Process32First Lib "kernel32" (ByVal hSnapshot As Long, lppe As PROCESSENTRY32) As Long
Public Declare Function Process32Next Lib "kernel32" (ByVal hSnapshot As Long, lppe As PROCESSENTRY32) As Long
Public Declare Function CloseHandle Lib "Kernel32.dll" (ByVal Handle As Long) As Long
Public Declare Function OpenProcess Lib "Kernel32.dll" (ByVal dwDesiredAccessas As Long, ByVal bInheritHandle As Long, ByVal dwProcId As Long) As Long
Public Declare Function EnumProcesses Lib "PSAPI.DLL" (ByRef lpidProcess As Long, ByVal cb As Long, ByRef cbNeeded As Long) As Long
Public Declare Function GetModuleFileNameExA Lib "PSAPI.DLL" (ByVal hProcess As Long, ByVal hModule As Long, ByVal ModuleName As String, ByVal nSize As Long) As Long
Public Declare Function EnumProcessModules Lib "PSAPI.DLL" (ByVal hProcess As Long, ByRef lphModule As Long, ByVal cb As Long, ByRef cbNeeded As Long) As Long
Public Declare Function CreateToolhelp32Snapshot Lib "kernel32" (ByVal dwFlags As Long, ByVal th32ProcessID As Long) As Long
Public Declare Function GetVersionExA Lib "kernel32" (lpVersionInformation As OSVERSIONINFO) As Integer
Public Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long
Public Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long) As Long
Public Declare Sub GlobalMemoryStatus Lib "kernel32" (lpBuffer As MEMORYSTATUS)



Public Const PROCESS_QUERY_INFORMATION = 1024
Public Const PROCESS_VM_READ = 16
Public Const MAX_PATH = 260
Public Const STANDARD_RIGHTS_REQUIRED = &HF0000
Public Const SYNCHRONIZE = &H100000
Public Const PROCESS_ALL_ACCESS = &H1F0FFF
Public Const TH32CS_SNAPPROCESS = &H2&
Public Const hNull = 0
Public Const WIN95_System_Found = 1
Public Const WINNT_System_Found = 2
Public Const Default_Log_Size = 10000000
Public Const Default_Log_Days = 0
Public Const SPECIFIC_RIGHTS_ALL = &HFFFF
Public Const STANDARD_RIGHTS_ALL = &H1F0000


Type MEMORYSTATUS
dwLength As Long
dwMemoryLoad As Long
dwTotalPhys As Long
dwAvailPhys As Long
dwTotalPageFile As Long
dwAvailPageFile As Long
dwTotalVirtual As Long
dwAvailVirtual As Long
End Type


Type PROCESS_MEMORY_COUNTERS
cb As Long
PageFaultCount As Long
PeakWorkingSetSize As Long
WorkingSetSize As Long
QuotaPeakPagedPoolUsage As Long
QuotaPagedPoolUsage As Long
QuotaPeakNonPagedPoolUsage As Long
QuotaNonPagedPoolUsage As Long
PagefileUsage As Long
PeakPagefileUsage As Long
End Type


Public Type PROCESSENTRY32
dwSize As Long
cntUsage As Long
th32ProcessID As Long ' This process
th32DefaultHeapID As Long
th32ModuleID As Long ' Associated exe
cntThreads As Long
th32ParentProcessID As Long ' This process's parent process
pcPriClassBase As Long ' Base priority of process threads
dwFlags As Long
szExeFile As String * 260 ' MAX_PATH
End Type


Public Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long '1 = Windows 95.
'2 = Windows NT
szCSDVersion As String * 128
End Type


Public Function GetProcesses(ByVal EXEName As String)

Dim booResult As Boolean
Dim lngLength As Long
Dim lngProcessID As Long
Dim strProcessName As String
Dim lngSnapHwnd As Long
Dim udtProcEntry As PROCESSENTRY32
Dim lngCBSize As Long 'Specifies the size, In bytes, of the lpidProcess array
Dim lngCBSizeReturned As Long 'Receives the number of bytes returned
Dim lngNumElements As Long
Dim lngProcessIDs() As Long
Dim lngCBSize2 As Long
Dim lngModules(1 To 200) As Long
Dim lngReturn As Long
Dim strModuleName As String
Dim lngSize As Long
Dim lngHwndProcess As Long
Dim lngLoop As Long
Dim b As Long
Dim c As Long
Dim e As Long
Dim d As Long
Dim pmc As PROCESS_MEMORY_COUNTERS
Dim lret As Long
Dim strProcName2 As String
Dim strProcName As String

'Turn on Error handler
On Error GoTo Error_handler

booResult = False

EXEName = UCase$(Trim$(EXEName))
lngLength = Len(EXEName)

'ProcessInfo.bolRunning = False

Select Case getVersion()
'I'm not bothered about windows 95/98 becasue this class probably wont be used on it anyway.
Case WIN95_System_Found 'Windows 95/98

Case WINNT_System_Found 'Windows NT

lngCBSize = 8 ' Really needs To be 16, but Loop will increment prior to calling API
lngCBSizeReturned = 96

Do While lngCBSize <= lngCBSizeReturned
DoEvents
'Increment Size
lngCBSize = lngCBSize * 2
'Allocate Memory for Array
ReDim lngProcessIDs(lngCBSize / 4) As Long
'Get Process ID's
lngReturn = EnumProcesses(lngProcessIDs(1), lngCBSize, lngCBSizeReturned)
Loop

'Count number of processes returned
lngNumElements = lngCBSizeReturned / 4
'Loop thru each process

For lngLoop = 1 To lngNumElements
DoEvents

[lihonggen0]

'Get a handle to the Process and Open
lngHwndProcess = OpenProcess(PROCESS_QUERY_INFORMATION Or PROCESS_VM_READ, 0, lngProcessIDs(lngLoop))

If lngHwndProcess <> 0 Then
'Get an array of the module handles for the specified process
lngReturn = EnumProcessModules(lngHwndProcess, lngModules(1), 200, lngCBSize2)

'If the Module Array is retrieved, Get the ModuleFileName
If lngReturn <> 0 Then

'Buffer with spaces first to allocate memory for byte array
strModuleName = Space(MAX_PATH)

'Must be set prior to calling API
lngSize = 500

'Get Process Name
lngReturn = GetModuleFileNameExA(lngHwndProcess, lngModules(1), strModuleName, lngSize)

'Remove trailing spaces
strProcessName = Left(strModuleName, lngReturn)

'Check for Matching Upper case result
strProcessName = UCase$(Trim$(strProcessName))

strProcName2 = GetElement(Trim(Replace(strProcessName, Chr$(0), "")), "\", 0, 0, GetNumElements(Trim(Replace(strProcessName, Chr$(0), "")), "\") - 1)

If strProcName2 = EXEName Then

'Get the Site of the Memory Structure
pmc.cb = LenB(pmc)

lret = GetProcessMemoryInfo(lngHwndProcess, pmc, pmc.cb)

Debug.Print EXEName & "::" & CStr(pmc.WorkingSetSize / 1024)

End If
End If
End If
'Close the handle to this process
lngReturn = CloseHandle(lngHwndProcess)
DoEvents
Next

End Select

IsProcessRunning_Exit:

'Exit early to avoid error handler
Exit Function
Error_handler:
Err.Raise Err, Err.Source, "ProcessInfo", Error
Resume Next
End Function


Private Function getVersion() As Long

Dim osinfo As OSVERSIONINFO
Dim retvalue As Integer

osinfo.dwOSVersionInfoSize = 148
osinfo.szCSDVersion = Space$(128)
retvalue = GetVersionExA(osinfo)
getVersion = osinfo.dwPlatformId

End Function


Private Function StrZToStr(s As String) As String
StrZToStr = Left$(s, Len(s) - 1)
End Function



Public Function GetElement(ByVal strList As String, ByVal strDelimiter As String, ByVal lngNumColumns As Long, ByVal lngRow As Long, ByVal lngColumn As Long) As String

Dim lngCounter As Long

' Append delimiter text to the end of the list as a terminator.
strList = strList & strDelimiter

' Calculate the offset for the item required based on the number of columns the list
' 'strList' has i.e. 'lngNumColumns' and from which row the element is to be
' selected i.e. 'lngRow'.
lngColumn = IIf(lngRow = 0, lngColumn, (lngRow * lngNumColumns) + lngColumn)

' Search for the 'lngColumn' item from the list 'strList'.
For lngCounter = 0 To lngColumn - 1

' Remove each item from the list.
strList = Mid$(strList, InStr(strList, strDelimiter) + Len(strDelimiter), Len(strList))

' If list becomes empty before 'lngColumn' is found then just
' return an empty string.
If Len(strList) = 0 Then
GetElement = ""
Exit Function
End If

Next lngCounter

' Return the sought list element.
GetElement = Left$(strList, InStr(strList, strDelimiter) - 1)

End Function


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'Function GetNumElements (ByVal strList As String,
' ByVal strDelimiter As String)
' As Integer
'
' strList = The element list.
' strDelimiter = The delimiter by which the elements in
' 'strList' are seperated.
'
' The function returns an integer which is the count of the
' number of elements in 'strList'.
'
' Author: Roger Taylor
'
' Date:26/12/1998
'
' Additional Information:
'
' Revision History:
'
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

Public Function GetNumElements(ByVal strList As String, ByVal strDelimiter As String) As Integer

Dim intElementCount As Integer

' If no elements in the list 'strList' then just return 0.
If Len(strList) = 0 Then
GetNumElements = 0
Exit Function
End If

' Append delimiter text to the end of the list as a terminator.
strList = strList & strDelimiter

' Count the number of elements in 'strlist'
While InStr(strList, strDelimiter) > 0
intElementCount = intElementCount + 1
strList = Mid$(strList, InStr(strList, strDelimiter) + 1, Len(strList))
Wend

' Return the number of elements in 'strList'.
GetNumElements = intElementCount

End Function


'If you're using VB4 or VB5, uncomment the following function:
'Function Replace(sInput As String, WhatToReplace As String, ReplaceWith As String) As String
'Dim Ret As Long
'Replace = sInput
'Ret = -Len(ReplaceWith) + 1
'Do
'Ret = InStr(Ret + Len(ReplaceWith), Replace, WhatToReplace, vbTextCompare)
'If Ret = 0 Then Exit Do
'Replace = Left$(Replace, Ret - 1) + ReplaceWith + Right$(Replace, Len(Replace) - Ret - Len(WhatToReplace) + 1)
'Loop
'End Function

[lihonggen0]

Declare Function OpenProcess Lib "Kernel32.dll" (ByVal dwDesiredAccessas As Long, ByVal bInheritHandle As Long, ByVal dwProcId As Long) As Long


?dwDesiredAccess
[in] Specifies the access to the process object. For operating systems that support security checking, this access is checked against any security descriptor for the target process. This parameter can be STANDARD_RIGHTS_REQUIRED or one or more of the following values.
PROCESS_ALL_ACCESS
Specifies all possible access flags for the process object.
PROCESS_CREATE_PROCESS
Used internally.
PROCESS_CREATE_THREAD
Enables using the process handle in the CreateRemoteThread function to create a thread in the process.
PROCESS_DUP_HANDLE
Enables using the process handle as either the source or target process in the DuplicateHandle function to duplicate a handle.
PROCESS_QUERY_INFORMATION
Enables using the process handle in the GetExitCodeProcess and GetPriorityClass functions to read information from the process object.
PROCESS_SET_QUOTA
Enables using the process handle in the AssignProcessToJobObject and SetProcessWorkingSetSize functions to set memory limits.
PROCESS_SET_INFORMATION
Enables using the process handle in the SetPriorityClass function to set the priority class of the process.
PROCESS_TERMINATE
Enables using the process handle in the TerminateProcess function to terminate the process.
PROCESS_VM_OPERATION
Enables using the process handle in the VirtualProtectEx and WriteProcessMemory functions to modify the virtual memory of the process.
PROCESS_VM_READ
Enables using the process handle in the ReadProcessMemory function to read from the virtual memory of the process.
PROCESS_VM_WRITE
Enables using the process handle in the WriteProcessMemory function to write to the virtual memory of the process.
SYNCHRONIZE
Windows NT/2000: Enables using the process handle in any of the wait functions to wait for the process to terminate.

?bInheritHandle
[in] Specifies whether the returned handle can be inherited by a new process created by the current process. If TRUE, the handle is inheritable.

?dwProcessId
[in] Specifies the identifier of the process to open.

[zyl910]

最好在每个模块的开头加上Option Explicit，这样就可以知道常数有没有声明