快抢分!!Win2000 下的注册表项目读取的问题!

sunbn 2000-07-13 05:20:00
Win2000下的API RegOpenKey打开一个键 & 用RegQueryValue 无法返回正确值!
为什么?那位高手,给点指示!!
谁有Win2000下的 Win32Api.txt 文件?
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jimgreen 2001-05-30
wo shie
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sunbn 2000-07-14
搞定了,原来是调用的参数问题,我眼高手低了,谢谢!!
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liyang 2000-07-14
好长啊!看晕了。:)
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TopHead 2000-07-13
访问注册表没问题的啊,

Option Explicit

Global Const REG_SZ As Long = 1
Global Const REG_DWORD As Long = 4

Global Const HKEY_CLASSES_ROOT = &H80000000
Global Const HKEY_CURRENT_USER = &H80000001
Global Const HKEY_LOCAL_MACHINE = &H80000002
Global Const HKEY_USERS = &H80000003

Global Const ERROR_NONE = 0
Global Const ERROR_BADDB = 1
Global Const ERROR_BADKEY = 2
Global Const ERROR_CANTOPEN = 3
Global Const ERROR_CANTREAD = 4
Global Const ERROR_CANTWRITE = 5
Global Const ERROR_OUTOFMEMORY = 6
Global Const ERROR_INVALID_PARAMETER = 7
Global Const ERROR_ACCESS_DENIED = 8
Global Const ERROR_INVALID_PARAMETERS = 87
Global Const ERROR_NO_MORE_ITEMS = 259

Global Const KEY_ALL_ACCESS = &H3F

Global Const REG_OPTION_NON_VOLATILE = 0

Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Declare Function RegCreateKeyEx Lib "advapi32.dll" Alias "RegCreateKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal Reserved As Long, ByVal lpClass As String, ByVal dwOptions As Long, ByVal samDesired As Long, ByVal lpSecurityAttributes As Long, phkResult As Long, lpdwDisposition As Long) As Long
Declare Function RegOpenKeyEx Lib "advapi32.dll" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, phkResult As Long) As Long
Declare Function RegQueryValueExString Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByVal lpData As String, lpcbData As Long) As Long
Declare Function RegQueryValueExLong Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Long, lpcbData As Long) As Long
Declare Function RegQueryValueExNULL Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByVal lpData As Long, lpcbData As Long) As Long
Declare Function RegSetValueExString Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByVal lpValue As String, ByVal cbData As Long) As Long
Declare Function RegSetValueExLong Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpValue As Long, ByVal cbData As Long) As Long
Private Declare Function RegDeleteKey& Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String)
Private Declare Function RegDeleteValue& Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal hKey As Long, ByVal lpValueName As String)
'删除主键
Public Function DeleteKey(lPredefinedKey As Long, sKeyName As String)
' Description:
' This Function will Delete a key
'
' Syntax:
' DeleteKey Location, KeyName
'
' Location must equal HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_lOCAL_MACHINE
' , HKEY_USERS
'
' KeyName is name of the key you wish to delete, it may include subkeys (example "Key1\SubKey1")


Dim lRetVal As Long 'result of the SetValueEx function
Dim hKey As Long 'handle of open key

'open the specified key

'lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, hKey)
lRetVal = RegDeleteKey(lPredefinedKey, sKeyName)
'RegCloseKey (hKey)
End Function
'删除子键
Public Function DeleteValue(lPredefinedKey As Long, sKeyName As String, sValueName As String)
' Description:
' This Function will delete a value
'
' Syntax:
' DeleteValue Location, KeyName, ValueName
'
' Location must equal HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_lOCAL_MACHINE
' , HKEY_USERS
'
' KeyName is the name of the key that the value you wish to delete is in
' , it may include subkeys (example "Key1\SubKey1")
'
' ValueName is the name of value you wish to delete

Dim lRetVal As Long 'result of the SetValueEx function
Dim hKey As Long 'handle of open key

'open the specified key
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, hKey)
lRetVal = RegDeleteValue(hKey, sValueName)
RegCloseKey (hKey)
End Function
'设置键值
Public Function SetValueEx(ByVal hKey As Long, sValueName As String, lType As Long, vValue As Variant) As Long
Dim Lvalue As Long
Dim sValue As String

Select Case lType
Case REG_SZ '字符
sValue = vValue
SetValueEx = RegSetValueExString(hKey, sValueName, 0&, lType, sValue, Len(sValue))
Case REG_DWORD '数值
Lvalue = vValue
SetValueEx = RegSetValueExLong(hKey, sValueName, 0&, lType, Lvalue, 4)
End Select

End Function

'获得键值
Function QueryValueEx(ByVal lhKey As Long, ByVal szValueName As String, vValue As Variant) As Long
Dim cch As Long
Dim lrc As Long
Dim lType As Long
Dim Lvalue As Long
Dim sValue As String

On Error GoTo QueryValueExError

' Determine the size and type of data to be read
lrc = RegQueryValueExNULL(lhKey, szValueName, 0&, lType, 0&, cch)
If lrc <> ERROR_NONE Then Error 5

Select Case lType
' For strings
Case REG_SZ:
sValue = String(cch, 0)
lrc = RegQueryValueExString(lhKey, szValueName, 0&, lType, sValue, cch)
If lrc = ERROR_NONE Then
vValue = Left$(sValue, cch)
Else
vValue = Empty
End If

' For DWORDS
Case REG_DWORD:
lrc = RegQueryValueExLong(lhKey, szValueName, 0&, lType, Lvalue, cch)
If lrc = ERROR_NONE Then vValue = Lvalue
Case Else
'all other data types not supported
lrc = -1
End Select

QueryValueExExit:

QueryValueEx = lrc
Exit Function

QueryValueExError:

Resume QueryValueExExit

End Function
'创建键
Public Function CreateNewKey(lPredefinedKey As Long, sNewKeyName As String)
' Description:
' This Function will create a new key
'
' Syntax:
' QueryValue Location, KeyName
'
' Location must equal HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_lOCAL_MACHINE
' , HKEY_USERS
'
' KeyName is name of the key you wish to create, it may include subkeys (example "Key1\SubKey1")



Dim hNewKey As Long 'handle to the new key
Dim lRetVal As Long 'result of the RegCreateKeyEx function

lRetVal = RegCreateKeyEx(lPredefinedKey, sNewKeyName, 0&, vbNullString, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, 0&, hNewKey, lRetVal)
RegCloseKey (hNewKey)
End Function

Sub Main()
' Examples of each function:
CreateNewKey HKEY_CURRENT_USER, "TestKey\SubKey1\SubKey2"
SetKeyValue HKEY_CURRENT_USER, "TestKey\SubKey1", "Test", "Testing, Testing", REG_SZ
MsgBox QueryValue(HKEY_CURRENT_USER, "TestKey\SubKey1", "Test")
DeleteKey HKEY_CURRENT_USER, "TestKey\SubKey1\SubKey2"
DeleteValue HKEY_CURRENT_USER, "TestKey\SubKey1", "Test"
DeleteKey HKEY_CURRENT_USER, "TestKey"
End Sub

Public Function SetKeyValue(lPredefinedKey As Long, sKeyName As String, sValueName As String, vValueSetting As Variant, lValueType As Long)
' Description:
' This Function will set the data field of a value
'
' Syntax:
' QueryValue Location, KeyName, ValueName, ValueSetting, ValueType
'
' Location must equal HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_lOCAL_MACHINE
' , HKEY_USERS
'
' KeyName is the key that the value is under (example: "Key1\SubKey1")
'
' ValueName is the name of the value you want create, or set the value of (example: "ValueTest")
'
' ValueSetting is what you want the value to equal
'
' ValueType must equal either REG_SZ (a string) Or REG_DWORD (an integer)

Dim lRetVal As Long 'result of the SetValueEx function
Dim hKey As Long 'handle of open key

'open the specified key

lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, hKey)
If lRetVal <> 0 Then
Call CreateNewKey(lPredefinedKey, sKeyName)
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, hKey)
End If
lRetVal = SetValueEx(hKey, sValueName, lValueType, vValueSetting)
RegCloseKey (hKey)
End Function
Public Function QueryValue(lPredefinedKey As Long, sKeyName As String, sValueName As String)
' Description:
' This Function will return the data field of a value
'
' Syntax:
' Variable = QueryValue(Location, KeyName, ValueName)
'
' Location must equal HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_lOCAL_MACHINE
' , HKEY_USERS
'
' KeyName is the key that the value is under (example: "Software\Microsoft\Windows\CurrentVersion\Explorer")
'
' ValueName is the name of the value you want to access (example: "link")

Dim lRetVal As Long 'result of the API functions
Dim hKey As Long 'handle of opened key
Dim vValue As Variant 'setting of queried value


lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, hKey)
If lRetVal = 0 Then
lRetVal = QueryValueEx(hKey, sValueName, vValue)
QueryValue = vValue
RegCloseKey (hKey)
Else
QueryValue = ""
End If
End Function
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