操作注册表需要用操作注册表API的函数
【函数】
RegQueryValueEx【操作系统】
Win9X:Yes
WinNT:Yes【声明】
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【说明】 获取一个项的设置值 【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 【其它】
【参数表】
hKey ----------- Long,一个已打开项的句柄,或者指定一个标准项名 lpValueName ---- String,要获取值的名字 lpReserved ----- Long,未用,设为零 lpType --------- Long,用于装载取回数据类型的一个变量 lpData --------- Any,用于装载指定值的一个缓冲区 lpcbData ------- Long,用于装载lpData缓冲区长度的一个变量。一旦返回,它会设为实际装载到缓冲区的字节数
【函数】
RegQueryValueEx【操作系统】
Win9X:Yes
WinNT:Yes【声明】
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【说明】 获取一个项的设置值 【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 【其它】
【参数表】
hKey ----------- Long,一个已打开项的句柄,或者指定一个标准项名 lpValueName ---- String,要获取值的名字 lpReserved ----- Long,未用,设为零 lpType --------- Long,用于装载取回数据类型的一个变量 lpData --------- Any,用于装载指定值的一个缓冲区 lpcbData ------- Long,用于装载lpData缓冲区长度的一个变量。一旦返回,它会设为实际装载到缓冲区的字节数
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
本示例首先使用 SaveSetting 语句来建立Windows注册区(或 16位 Windows 平台的.ini档)里 appname 应用程序的项目,然后使用 GetSetting 函数来得到其中一项设置并显示出来。因为有传入参数 default,GetSetting 函数一定会有返回值。请注意,section 名称不能用 GetSetting 函数取得。最后,使用 DeleteSetting 语句将该应用程序项删除。' 用来保存 GetSetting 函数所返回之二维数组数据的变量。
Dim MySettings As Variant
' 在注册区中添加项目。
SaveSetting "MyApp","Startup", "Top", 75
SaveSetting "MyApp","Startup", "Left", 50Debug.Print GetSetting(appname := "MyApp", section := "Startup", _
key := "Left", default := "25")DeleteSetting "MyApp", "Startup"
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
HKEY_CURRENT_USER\Software\VB and VBA Program Settings这个注册表分支进行操作的。