'模块名: ActiveX 部件(OCX DLL)注册/反注册
'描 述: 该代码演示怎样在程序中注册和反注册,在regsvr32上自己进行.
Option Explicit

Private Declare Function LoadLibraryRegister _
Lib "KERNEL32" _
Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long

Private Declare Function FreeLibraryRegister _
Lib "KERNEL32" _
Alias "FreeLibrary" (ByVal hLibModule As Long) As Long

Private Declare Function CloseHandle Lib "KERNEL32" (ByVal hObject As Long) As Long

Private Declare Function GetProcAddressRegister _
Lib "KERNEL32" _
Alias "GetProcAddress" (ByVal hModule As Long, _
ByVal lpProcName As String) As Long

Private Declare Function CreateThreadForRegister _
Lib "KERNEL32" _
Alias "CreateThread" (lpThreadAttributes As Long, _
ByVal dwStackSize As Long, _
ByVal lpStartAddress As Long, _
ByVal lpparameter As Long, _
ByVal dwCreationFlags As Long, _
lpThreadID As Long) As Long

Private Declare Function WaitForSingleObject _
Lib "KERNEL32" (ByVal hHandle As Long, _
ByVal dwMilliseconds As Long) As Long

Private Declare Function GetExitCodeThread _
Lib "KERNEL32" (ByVal hThread As Long, _
lpExitCode As Long) As Long

Private Declare Sub ExitThread Lib "KERNEL32" (ByVal dwExitCode As Long)

Private Const STATUS_WAIT_0 = &H0

Private Const WAIT_OBJECT_0 = ((STATUS_WAIT_0) + 0)

Private Const NOERRORS As Long = 0

Private Enum stRegisterStatus
stFileCouldNotBeLoadedIntoMemorySpace = 1
stNotAValidActiveXComponent = 2
stActiveXComponentRegistrationFailed = 3
stActiveXComponentRegistrationSuccessful = 4
stActiveXComponentUnRegisterSuccessful = 5
stActiveXComponentUnRegistrationFailed = 6
stNoFileProvided = 7
End Enum

Public Function Register(ByVal p_sFileName As String) As Variant
Dim lLib As Long
Dim lProcAddress As Long
Dim lThreadID As Long
Dim lSuccess As Long
Dim lExitCode As Long
Dim lThreadHandle As Long
Dim lRet As Long

On Error GoTo ErrorHandler

If lRet = NOERRORS Then
If p_sFileName = "" Then
lRet = stNoFileProvided
End If
End If

If lRet = NOERRORS Then
lLib = LoadLibraryRegister(p_sFileName)
If lLib = 0 Then
lRet = stFileCouldNo
tBeLoadedIntoMemorySpace
End If
End If

If lRet = NOERRORS Then
lProcAddress = GetProcAddressRegister(lLib, "DllRegisterServer")
If lProcAddress = 0 Then
lRet = stNotAValidActiveXComponent
Else
lThreadHandle = CreateThreadForRegister(0, 0, lProcAddress, 0, 0, lThreadID)
If lThreadHandle <> 0 Then
lSuccess = (WaitForSingleObject(lThreadHandle, 10000) = WAIT_OBJECT_0)
If lSuccess = 0 Then
Call GetExitCodeThread(lThreadHandle, lExitCode)
Call ExitThread(lExitCode)
lRet = stActiveXComponentRegistrationFailed
Else
lRet = stActiveXComponentRegistrationSuccessful
End If
End If
End If
End If

ExitRoutine:

Register = lRet

If lThreadHandle <> 0 Then
Call CloseHandle(lThreadHandle)
End If

If lLib <> 0 Then
Call FreeLibraryRegister(lLib)
End If

Exit Function

ErrorHandler:
lRet = Err.Number
Resume ExitRoutine
End Function

Public Function UnRegister(ByVal p_sFileName As String) As Variant
Dim lLib As Long
Dim lProcAddress As Long
Dim lThreadID As Long
Dim lSuccess As Long
Dim lExitCode As Long
Dim lThreadHandle As Long
Dim lRet As Long

On Error GoTo ErrorHandler

If lRet = NOERRORS Then
If p_sFileName = "" Then
lRet = stNoFileProvided
End If
End If

If lRet = NOERRORS Then
lLib = LoadLibraryRegister(p_sFileName)
If lLib = 0 Then
lRet = stFileCouldNotBeLoadedIntoMemorySpace
End If
End If

If lRet = NOERRORS Then
lProcAddress = GetProcAddressRegister(lLib, "DllUnregisterServer")
If lProcAddress = 0 Then
lRet = stNotAValidActiveXComponent
Else
lThreadHandle = CreateThreadForRegister(0, 0, lProcAddress, 0, 0, lThreadID)
If lThreadHandle <> 0 Then
lSuccess = (WaitForSingleObject(lThreadHandle, 10000) = WAIT_OBJECT_0)
If lSuccess = 0 Then
Call GetExitCodeThread(lThreadHandle, lExitCode)
Call ExitThread(lExitCode)
lRet = stActiveXComponentUnRegistrationFailed
Else
lRet = stActiveXComponentUnRegisterSuccessful
End If
End If
End If
End If

ExitRoutine:

UnRegister = lRet

If lThreadHandle <> 0 Then
Call CloseHandle(lThreadHandle)
End If

If lLib <> 0 Then
Call FreeLibraryRegister(lLib)
End If

Exit Function

ErrorHandler:
lRet = Err.Number
Resume ExitRoutine
End Function