问三个问题,谁能解答，马上给你分

1.Windows系统中的注册表（Resgister）保存着大量的信息，我们可读写注册表来更好地为我们软件服务。　　下面详细讲叙如何通过调用API函数操作注册表：如何打开、创建主键，如何保存键值，以及查询某键的键值等。　　一、常数定义和API申明（我们会在使用该API时对它进行说明）：　　Private Const HKEY_CLASSES_ROOT = ＆H80000000 主键
　　Private Const HKEY_CURRENT_USER = ＆H80000001 主键
　　Private Const STANDARD_RIGHTS_ALL = ＆H1F0000
　　Private Const KEY_ENUMERATE_SUB_KEYS = ＆H8
　　Private Const KEY_SET_VALUE = ＆H2
　　Private Const KEY_CREATE_SUB_KEY = ＆H4
　　Private Const KEY_QUERY_VALUE = ＆H1
　　Private Const KEY_NOTIFY = ＆H10
　　Private Const KEY_CREATE_LINK = ＆H20
　　Private Const SYNCHRONIZE = ＆H100000
　　Private Const KEY_ALL_ACCESS = ((STANDARD_RIGHTS_ALL Or KEY_QUERY_VALUE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY Or KEY_CREATE_LINK) And (Not SYNCHRONIZE))
　　Private Const REG_MULTI_SZ = 7
　　Private Const ERROR_SUCCESS = 0＆
　　Private Const READ_CONTROL = ＆H20000
　　Private Const REG_SZ = 1
　　Private Const REG_DWORD = 4
　　Private Const REG_EXPAND_SZ = 2
　　Private Const REG_BINARY = 3
　　Private Const REG_DWORD_BIG_ENDIAN = 5
　　Private Const REG_DWORD_LITTLE_ENDIAN = 4
　　Private Const REG_NONE = 0
　　Private 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
　　Private Declare Function RegCreateKey Lib “advapi32.dll" Alias “RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
　　Private Declare Function RegSetValueEx Lib “advapi32.dll" Alias “RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long
　　Private Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As 　　Any, lpcbData As Long) As Long Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
　　二、将下列代码放在窗体的Load事件中
　　Private Sub Form_Load()
　　Dim hKey As Long 主键的句柄
　　Dim lpData As String 查询得到的键值
　　Dim SizeOfData As Long 键值的长度
　　Dim ValueType As Long 键值的类型
　　SizeOfData = 150
　　Dim return_OpenKey As Long 函数调用的返回值
　　Dim PriKey As String 主键
　　Dim KeyValue1, KeyValue2 As String 键值名称
　　PriKey = "北信BITI\People" 主键
　　KeyValue1 = "教授" 键值名称
　　KeyValue2 = "学生" 键值名称
　　下面的函数RegOpenKeyEx取得一个句柄hKey return_OpenKey =RegOpenKeyEx(HKEY_CURRENT_USER, "",0, KEY_ALL_ACCESS, hKey)
　
　　下面的函数RegCreateKey建立一个主键，如此键已存在，则打开它 If RegCreateKey(hKey, PriKey, hKey) <> ERROR_SUCCESS Then
MsgBox "create " ＆ PriKey ＆ "Failed"
Exit Sub
End If
　　
Dim KeyData As String 键值
KeyData = "500" 　　下面的函数RegSetValueEx给指定的键值名称赋键值 If RegSetValueEx(hKey, KeyValue1, 0＆, REG_SZ, ByVal KeyData, Len(KeyData) ＋ 1) <> ERROR_SUCCESS Then
　　 MsgBox "SetValue " ＆ KeyValue1 ＆ "Failed "
　　 Exit Sub
　　 End If
　　 KeyData = "15020" 　　下面的函数RegSetValueEx给指定的键值名称"学生" 赋键值为"15020" If RegSetValueEx(hKey, KeyValue2, 0＆, REG_SZ, ByVal KeyData, Len(KeyData) ＋ 1) <> ERROR_SUCCESS Then
MsgBox "SetValue " ＆ KeyValue2 ＆ "Failed "
Exit Sub
End If
　　
return_OpenKey = RegQueryValueEx(hKey, KeyValue1, 0＆, REG_SZ, 0＆, SizeOfData)
lpData = String(SizeOfData ＋ 1, " ") 　　下面的函数RegQueryValueEx检索指定键值名称的键值和键值类型 If RegQueryValueEx(hKey, KeyValue1, 0＆, REG_SZ, ByVal lpData, SizeOfData) <> ERROR_SUCCESS Then
MsgBox "Query " ＆ KeyValue1 ＆ "Failed"
End If
RegCloseKey (hKey) 释放主键的句柄
End Sub 　　运行此程序后，打开注册表，我们会发现在主键 HKEY_CURRENT_USER（在此主键下记录本机当前用户的一些信息）下，增加了子键"北信BITI\People"，我们还可看到两个指定的键值名称都有正确的键值。从而完成了注册的任务。　　注：此程序在VB5.0中运行通过。

Public Const HKEY_CLASSES_ROOT = &H80000000
Public Const HKEY_CURRENT_USER = &H80000001
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public Const HKEY_USERS = &H80000003
Public Const HKEY_PERFORMANCE_DATA = &H80000004
Public Const ERROR_SUCCESS = 0&Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String) As Long
Declare Function RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal hKey As Long, ByVal lpValueName As String) As Long
Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As LongPrivate Declare Function RegEnumKeyEx Lib "advapi32.dll" Alias "RegEnumKeyExA" (ByVal hKey As Long, ByVal dwIndex As Long, ByVal lpName As String, lpcbName As Long, ByVal lpReserved As Long, ByVal lpClass As String, lpcbClass As Long, lpftLastWriteTime As Any) As Long
Private Declare Function RegEnumValue Lib "advapi32.dll" Alias "RegEnumValueA" (ByVal hKey As Long, ByVal dwIndex As Long, ByVal lpValueName As String, lpcbValueName As Long, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As LongPublic Const REG_SZ = 1                         ' Unicode nul terminated string
Public Const REG_DWORD = 4                      ' 32-bit numberPublic Function GetString(hKey As Long, strPath As String, strValue As String)

  Dim keyhand As Long
  Dim datatype As Long
  Dim lResult As Long
  Dim strBuf As String
  Dim lDataBufSize As Long
  Dim intZeroPos As Integer
  r = RegOpenKey(hKey, strPath, keyhand)
  lResult = RegQueryValueEx(keyhand, strValue, 0&, lValueType, ByVal 0&, lDataBufSize)
  If lValueType = REG_SZ Then
    strBuf = String(lDataBufSize, " ")
    lResult = RegQueryValueEx(keyhand, strValue, 0&, 0&, ByVal strBuf, lDataBufSize)
    If lResult = ERROR_SUCCESS Then
        intZeroPos = InStr(strBuf, Chr$(0))
        If intZeroPos > 0 Then
            GetString = Left$(strBuf, intZeroPos - 1)
        Else
            GetString = strBuf
        End If
    End If
  End IfEnd FunctionPublic Sub SaveString(hKey As Long, strPath As String, strValue As String, strdata As String)

  Dim keyhand As Long
  Dim r As Long
  r = RegCreateKey(hKey, strPath, keyhand)
  r = RegSetValueEx(keyhand, strValue, 0, REG_SZ, ByVal strdata, Len(strdata))
  r = RegCloseKey(keyhand)End SubPublic Function DelString(ByVal hKey As Long, ByVal strPath As String, ByVal strValue As String)

  Dim keyhand As Long
  Dim r As Long
  r = RegOpenKey(hKey, strPath, keyhand)
  r = RegDeleteValue(keyhand, strValue)
  r = RegCloseKey(keyhand)End FunctionPublic Function DelKeys(ByVal hKey As Long, ByVal strPath As String) ', ByVal strKeys As String)  Dim r As Long
  r = RegDeleteKey(hKey, strPath)End FunctionPublic Function CreateKeys(ByVal hKey As Long, ByVal strPath As String)  Dim keyhand As Long
  Dim r As Long
  r = RegCreateKey(hKey, strPath, keyhand)
  r = RegCloseKey(keyhand)End Function
Public Function ListSubkey(ByVal hKey As Long, ByVal strPath As String) As String  Dim keyhand As Long
  Dim r As Long
  Dim strlistsubkey As String

  Dim sName As String, sData As String, Ret As Long, RetData As Long
  Dim indexs As Long

  Const ERROR_NO_MORE_ITEMS = 259&
  Const BUFFER_SIZE As Long = 255
  Ret = BUFFER_SIZE
  sName = Space(BUFFER_SIZE)

  r = RegOpenKey(hKey, strPath, keyhand)
  While RegEnumKeyEx(keyhand, indexs, sName, Ret, ByVal 0&, vbNullString, ByVal 0&, ByVal 0&) <> ERROR_NO_MORE_ITEMS
    If strlistsubkey = "" Then
        strlistsubkey = Left$(sName, Ret)
    Else
        strlistsubkey = strlistsubkey + "_" + Left$(sName, Ret)
    End If
    indexs = indexs + 1
  Wend
  ListSubkey = strlistsubkey
End Function
调用：列举一个键的所有子键
Dim myarray() As String

sl = ListSubkey(HKEY_LOCAL_MACHINE, "SOFTWARE\") myarray = Split(sl, "_", -1, 1) linkcount = UBound(myarray, 1)

For i = 0 To linkcount
     debug.print myarray(i)
Next其他函数调用：
Private Sub keycreate_Click()
  Call CreateKeys(HKEY_LOCAL_MACHINE, "SOFTWARE\pjzc\")
End SubPrivate Sub delkey_Click()
  Call DelKeys(HKEY_LOCAL_MACHINE, "SOFTWARE\pjzc\")
End SubPrivate Sub regdel_Click()
  Call DelString(HKEY_LOCAL_MACHINE, "SOFTWARE\pjzc\", "setupdate")
End SubPrivate Sub regsave_Click()
   Call SaveString(HKEY_LOCAL_MACHINE, "SOFTWARE\pjzc\", "setupdate", regvalue.Text)
End SubPrivate Sub regshow_Click()
   regvalue.Text = GetString(HKEY_LOCAL_MACHINE, "SOFTWARE\pjzc\", "setupdate")
End Sub

1.savesetting
getsetting
2.xor

1、savesetting
getsetting
2、asc("G") xor asc("w")
进行一个位操作

调试易

问三个问题,谁能解答，马上给你分

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