用VB得到windows系统安装时的时间(for NT,2000,XP,..)

Option Explicit
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 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
Private Const HKEY_LOCAL_MACHINE = &H80000002
Private Const REG_DWORD = 4
Function GetWindowsNTInstallTime() As String
On Error Resume Next
Dim InstallDateValue As Long
Dim hKey As Long
Dim ret As String
If RegCreateKey(HKEY_LOCAL_MACHINE, "SOFTWARE/Microsoft/Windows NT/CurrentVersion", hKey) = 0 Then
If RegQueryValueEx(hKey, "InstallDate", 0&, REG_DWORD, InstallDateValue, 4) = 0 Then
ret = CStr(InstallDateValue)
End If
If hKey Then RegCloseKey hKey
End If
If ret <> "" Then
GetWindowsNTInstallTime = DateAdd("s", CLng(ret), "1970-01-01 00:00")
Else
GetWindowsNTInstallTime = "时间未知"
End If
End Function
Private Sub Command1_Click()
MsgBox "当前系统的安装时间为：" & GetWindowsNTInstallTime, vbInformation, ""
End Sub
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' 转载请注明出处
' 作者：唐细刚
' 邮箱：tanaya@163.com
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