必须用RegCreateKeyEx!RegCreateKeyEx VB声明
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, lpSecurityAttributes As SECURITY_ATTRIBUTES, phkResult As Long, lpdwDisposition As Long) As Long
说明
在指定项下创建新项的更复杂的方式。在Win32环境中建议使用这个函数。如指定的项已经存在,则函数会打开现有的项
返回值
Long,零(ERROR_SUCCESS)表示成功。其他任何值都代表一个错误代码
参数表
参数 类型及说明
hKey Long,一个打开项的句柄,或者一个标准项名
lpSubKey String,欲创建的新子项的名字
Reserved Long,设为零
lpClass String,项的类名
dwOptions Long,下述常数为零:REG_OPTION_VOLATILE——这个项不正式保存下来,系统重新启动后会消失
samDesired Long,带有前缀KEY_??的一个或多个常数。它们组合起来描述了允许对这个项进行哪些操作
lpSecurityAttributes SECURITY_ATTRIBUTES,对这个项的安全特性进行描述的一个结构(用ByVal As Long传递空值)。不适用于windows 95
phkResult Long,指定用于装载新子项句柄的一个变量
lpdwDisposition Long,用于装载下列某个常数的一个变量:
REG_CREATED_NEW_KEY——新建的一个子项
REG_OPENED_EXISTING_KEY——打开一个现有的项 VB操作注册表:
http://www.sqreg.com/file/vb/reg_01.htm
http://www.sqreg.com/file/vb/reg_02.htm
http://www.sqreg.com/file/vb/reg_03.htm
http://www.sqreg.com/file/vb/reg_04.htm
http://www.sqreg.com/file/vb/reg_05.htm
http://www.sqreg.com/file/vb/reg_06.htm
http://www.sqreg.com/file/vb/reg_07.htm
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, lpSecurityAttributes As SECURITY_ATTRIBUTES, phkResult As Long, lpdwDisposition As Long) As Long
说明
在指定项下创建新项的更复杂的方式。在Win32环境中建议使用这个函数。如指定的项已经存在,则函数会打开现有的项
返回值
Long,零(ERROR_SUCCESS)表示成功。其他任何值都代表一个错误代码
参数表
参数 类型及说明
hKey Long,一个打开项的句柄,或者一个标准项名
lpSubKey String,欲创建的新子项的名字
Reserved Long,设为零
lpClass String,项的类名
dwOptions Long,下述常数为零:REG_OPTION_VOLATILE——这个项不正式保存下来,系统重新启动后会消失
samDesired Long,带有前缀KEY_??的一个或多个常数。它们组合起来描述了允许对这个项进行哪些操作
lpSecurityAttributes SECURITY_ATTRIBUTES,对这个项的安全特性进行描述的一个结构(用ByVal As Long传递空值)。不适用于windows 95
phkResult Long,指定用于装载新子项句柄的一个变量
lpdwDisposition Long,用于装载下列某个常数的一个变量:
REG_CREATED_NEW_KEY——新建的一个子项
REG_OPENED_EXISTING_KEY——打开一个现有的项 VB操作注册表:
http://www.sqreg.com/file/vb/reg_01.htm
http://www.sqreg.com/file/vb/reg_02.htm
http://www.sqreg.com/file/vb/reg_03.htm
http://www.sqreg.com/file/vb/reg_04.htm
http://www.sqreg.com/file/vb/reg_05.htm
http://www.sqreg.com/file/vb/reg_06.htm
http://www.sqreg.com/file/vb/reg_07.htm
'This program needs 3 buttons
Const REG_SZ = 1 ' Unicode nul terminated string
Const REG_BINARY = 3 ' Free form binary
Const HKEY_CURRENT_USER = &H80000001
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey 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 RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal hKey As Long, ByVal lpValueName As String) As Long
Private Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult 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 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
Function RegQueryStringValue(ByVal hKey As Long, ByVal strValueName As String) As String
Dim lResult As Long, lValueType As Long, strBuf As String, lDataBufSize As Long
'retrieve nformation about the key
lResult = RegQueryValueEx(hKey, strValueName, 0, lValueType, ByVal 0, lDataBufSize)
If lResult = 0 Then
If lValueType = REG_SZ Then
'Create a buffer
strBuf = String(lDataBufSize, Chr$(0))
'retrieve the key's content
lResult = RegQueryValueEx(hKey, strValueName, 0, 0, ByVal strBuf, lDataBufSize)
If lResult = 0 Then
'Remove the unnecessary chr$(0)'s
RegQueryStringValue = Left$(strBuf, InStr(1, strBuf, Chr$(0)) - 1)
End If
ElseIf lValueType = REG_BINARY Then
Dim strData As Integer
'retrieve the key's value
lResult = RegQueryValueEx(hKey, strValueName, 0, 0, strData, lDataBufSize)
If lResult = 0 Then
RegQueryStringValue = strData
End If
End If
End If
End Function
Function GetString(hKey As Long, strPath As String, strValue As String)
Dim Ret
'Open the key
RegOpenKey hKey, strPath, Ret
'Get the key's content
GetString = RegQueryStringValue(Ret, strValue)
'Close the key
RegCloseKey Ret
End Function
Sub SaveString(hKey As Long, strPath As String, strValue As String, strData As String)
Dim Ret
'Create a new key
RegCreateKey hKey, strPath, Ret
'Save a string to the key
RegSetValueEx Ret, strValue, 0, REG_SZ, ByVal strData, Len(strData)
'close the key
RegCloseKey Ret
End Sub
Sub SaveStringLong(hKey As Long, strPath As String, strValue As String, strData As String)
Dim Ret
'Create a new key
RegCreateKey hKey, strPath, Ret
'Set the key's value
RegSetValueEx Ret, strValue, 0, REG_BINARY, CByte(strData), 4
'close the key
RegCloseKey Ret
End Sub
Sub DelSetting(hKey As Long, strPath As String, strValue As String)
Dim Ret
'Create a new key
RegCreateKey hKey, strPath, Ret
'Delete the key's value
RegDeleteValue Ret, strValue
'close the key
RegCloseKey Ret
End Sub
Private Sub Command1_Click()
Dim strString As String
'Ask for a value
strString = InputBox("Please enter a value between 0 and 255 to be saved as a binary value in the registry.", App.Title)
If strString = "" Or Val(strString) > 255 Or Val(strString) < 0 Then
MsgBox "Invalid value entered ...", vbExclamation + vbOKOnly, App.Title
Exit Sub
End If
'Save the value to the registry
SaveStringLong HKEY_CURRENT_USER, "KPD-Team", "BinaryValue", CByte(strString)
End Sub
Private Sub Command2_Click()
'Get a string from the registry
Ret = GetString(HKEY_CURRENT_USER, "KPD-Team", "BinaryValue")
If Ret = "" Then MsgBox "No value found !", vbExclamation + vbOKOnly, App.Title: Exit Sub
MsgBox "The value is " + Ret, vbOKOnly + vbInformation, App.Title
End Sub
Private Sub Command3_Click()
'Delete the setting from the registry
DelSetting HKEY_CURRENT_USER, "KPD-Team", "BinaryValue"
MsgBox "The value was deleted ...", vbInformation + vbOKOnly, App.Title
End Sub
Private Sub Form_Load()
Command1.Caption = "Set Value"
Command2.Caption = "Get Value"
Command3.Caption = "Delete Value"
End Sub
RegSetValue()及 RegSetValueEx()都是用来设置注册表键值的。两者的区别
在于前者是设置注册表键的默认值,仅支持作为数据类型的字符串,而后者不仅继
承了前者的所有功能而且还能对多值或类型进行操作。一般API对比比较新的函数
都回在后缀追加“Ex”的同样名称函数,建议在编程中均应尽可能的使用高级函
数。而初级函数是向上兼容的。与其他程序相同,对注册表的编程也要用到句柄
。通过一个句柄访问注册表键值,当打开或创建一个键值的时候,会返回一个该
键的句柄,并且调用和分析键和创建键值,在分析和创建的同时需要传递句柄到
函数。WINDOWS提供预定义的用语根一级键的保留句柄。
HKEY_CLASS_ROOT,HKEY_CURRENT_USER,HKEY_LOCAL_MACHINE,HKEY_USER。这些都
是与注册表的根键相对应并且同名的句柄。当访问一个根键的时候,传递这些通
用句柄。这就不用打开根键啦,因为他们总是在打开状态下,可使用默认键的句
柄访问
Const HKEY_CURRENT_USER = &H80000001
Const REG_OPTION_BACKUP_RESTORE = 4 ' open for backup or restore
Const REG_OPTION_VOLATILE = 1 ' Key is not preserved when system is rebooted
Const REG_OPTION_NON_VOLATILE = 0 ' Key is preserved when system is rebooted
Const STANDARD_RIGHTS_ALL = &H1F0000
Const SYNCHRONIZE = &H100000
Const READ_CONTROL = &H20000
Const STANDARD_RIGHTS_READ = (READ_CONTROL)
Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)
Const KEY_CREATE_LINK = &H20
Const KEY_CREATE_SUB_KEY = &H4
Const KEY_ENUMERATE_SUB_KEYS = &H8
Const KEY_NOTIFY = &H10
Const KEY_QUERY_VALUE = &H1
Const KEY_SET_VALUE = &H2
Const KEY_READ = ((STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) And (Not SYNCHRONIZE))
Const KEY_WRITE = ((STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY) And (Not SYNCHRONIZE))
Const KEY_EXECUTE = (KEY_READ)
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 Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String) As Long
Private 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, lpSecurityAttributes As Any, phkResult As Long, lpdwDisposition As Long) As Long
Private Declare Function RegOpenKeyEx Lib "advapi32.dll" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal Reserved As Long, ByVal samDesired As Long, phkResult As Long) As Long
Private Sub Form_Load()
Dim Result As Long
'Check if the specified key exists
RegOpenKeyEx HKEY_CURRENT_USER, "KPD-Team", 0, KEY_ALL_ACCESS, Result
'If the key doesn't exist, we create it
If Result = 0 Then
'Create a new key
RegCreateKeyEx HKEY_CURRENT_USER, "KPD-Team", 0, "REG_DWORD", REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, ByVal 0&, Result, Ret
If Result = 0 Then
MsgBox "Error while creating the Key!!"
Exit Sub
End If
End If
'Delete the key
RegDeleteKey Result, ""
'close the handle
RegCloseKey Result
End Sub