Código [Seleccionar]
Option Explicit
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 RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegEnumKey Lib "advapi32.dll" Alias "RegEnumKeyA" (ByVal hKey As Long, ByVal dwIndex As Long, ByVal lpName As String, ByVal cbName 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 Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (dest As Any, source As Any, ByVal numBytes As Long)
Private Const KEY_READ = &H20019
Private Const KEY_ALL_ACCESS = &H3F
Const REG_SZ = 1
Const REG_EXPAND_SZ = 2
Const REG_BINARY = 3
Const REG_DWORD = 4
Const REG_MULTI_SZ = 7
Const ERROR_MORE_DATA = 234
Function GetRegistryValue(ByVal hKey As Long, ByVal KeyName As String, _
ByVal ValueName As String, Optional DefaultValue As Variant) As Variant
Dim handle As Long
Dim resLong As Long
Dim resString As String
Dim resBinary() As Byte
Dim length As Long
Dim retVal As Long
Dim valueType As Long
' Prepare the default result
GetRegistryValue = IIf(IsMissing(DefaultValue), Empty, DefaultValue)
' Open the key, exit if not found.
If RegOpenKeyEx(hKey, KeyName, 0, KEY_READ, handle) Then
Exit Function
End If
' prepare a 1K receiving resBinary
length = 1024
ReDim resBinary(0 To length - 1) As Byte
' read the registry key
retVal = RegQueryValueEx(handle, ValueName, 0, valueType, resBinary(0), _
length)
' if resBinary was too small, try again
If retVal = ERROR_MORE_DATA Then
' enlarge the resBinary, and read the value again
ReDim resBinary(0 To length - 1) As Byte
retVal = RegQueryValueEx(handle, ValueName, 0, valueType, resBinary(0), _
length)
End If
' return a value corresponding to the value type
Select Case valueType
Case REG_DWORD
CopyMemory resLong, resBinary(0), 4
GetRegistryValue = resLong
Case REG_SZ, REG_EXPAND_SZ
' copy everything but the trailing null char
resString = Space$(length - 1)
CopyMemory ByVal resString, resBinary(0), length - 1
GetRegistryValue = resString
Case REG_BINARY
' resize the result resBinary
If length <> UBound(resBinary) + 1 Then
ReDim Preserve resBinary(0 To length - 1) As Byte
End If
GetRegistryValue = resBinary()
Case REG_MULTI_SZ
' copy everything but the 2 trailing null chars
resString = Space$(length - 2)
CopyMemory ByVal resString, resBinary(0), length - 2
GetRegistryValue = resString
Case Else
RegCloseKey handle
Err.Raise 1001, , "Unsupported value type"
End Select
' close the registry key
RegCloseKey handle
End Function
Function EnumRegistryKeys(ByVal hKey As Long, ByVal KeyName As String) As Collection
'Enumerate registry keys under a given key 'Returns a collection of strings
Dim handle As Long
Dim length As Long
Dim index As Long
Dim subkeyName As String
' initialize the result collection
Set EnumRegistryKeys = New Collection
' Open the key, exit if not found
If Len(KeyName) Then
If RegOpenKeyEx(hKey, KeyName, 0, KEY_READ, handle) Then Exit Function
' in all case the subsequent functions use hKey
hKey = handle
End If
Do
' this is the max length for a key name
length = 260
subkeyName = Space$(length)
' get the N-th key, exit the loop if not found
If RegEnumKey(hKey, index, subkeyName, length) Then Exit Do
' add to the result collection
subkeyName = Left$(subkeyName, InStr(subkeyName, vbNullChar) - 1)
EnumRegistryKeys.Add subkeyName, subkeyName
' prepare to query for next key
index = index + 1
Loop
' Close the key, if it was actually opened
If handle Then RegCloseKey handle
End Function
Function CheckRegistryKey(ByVal hKey As Long, ByVal KeyName As String) As Boolean
' Return True if a Registry key exists
Dim handle As Long
' Try to open the key
If RegOpenKeyEx(hKey, KeyName, 0, KEY_READ, handle) = 0 Then
' The key exists
CheckRegistryKey = True
' Close it before exiting
RegCloseKey handle
End If
End Function
Private Sub Form_Load()
Dim i As Long
Dim variable As String
If EnumRegistryKeys(&H80000002, "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList").Count > 0 Then
For i = 1 To EnumRegistryKeys(&H80000002, "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList").Count
variable = variable + EnumRegistryKeys(&H80000002, "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList").Item(i) + vbNewLine
Next i
MsgBox variable
Else
MsgBox "No"
End If
End
End Sub