vbnet注册界面 vb做一个注册界面

VB.net2010 操作注册表

的完整路径写在HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

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就可以自启动了。

以下是我前一段时间写的防u盘自动运行的程序，里面可以找到如何操作注册表。

Option Explicit

Global Const REG_SZ As Long = 1

Global Const REG_DWORD As Long = 4

Global Const HKEY_CLASSES_ROOT = H80000000

Global Const HKEY_CURRENT_USER = H80000001

Global Const HKEY_LOCAL_MACHINE = H80000002

Global Const HKEY_USERS = H80000003

Global Const ERROR_NONE = 0

Global Const ERROR_BADDB = 1

Global Const ERROR_BADKEY = 2

Global Const ERROR_CANTOPEN = 3

Global Const ERROR_CANTREAD = 4

Global Const ERROR_CANTWRITE = 5

Global Const ERROR_OUTOFMEMORY = 6

Global Const ERROR_INVALID_PARAMETER = 7

Global Const ERROR_ACCESS_DENIED = 8

Global Const ERROR_INVALID_PARAMETERS = 87

Global Const ERROR_NO_MORE_ITEMS = 259

Global Const KEY_ALL_ACCESS = H3F

Global Const REG_OPTION_NON_VOLATILE = 0

Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hkey As Long) As Long

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

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 Long, 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, lpValue As Long, ByVal cbData As Long) As Long

Private Sub cmdAbout_Click()

MsgBox "作者wolfccb不对本软件可能造成的任何错误或损失负责，请自行承担使用风险。", vbInformation, "About"

End Sub

Private Sub cmdDefault_Click()

Check0.Value = 1

Check1.Value = 0

Check2.Value = 1

Check3.Value = 0

Check4.Value = 1

Check5.Value = 0

Check6.Value = 0

End Sub

Private Sub cmdExit_Click()

Unload Me

End Sub

Private Sub cmdRecommend_Click()

Check0.Value = 1

Check1.Value = 1

Check2.Value = 1

Check3.Value = 1

Check4.Value = 1

Check5.Value = 0

Check6.Value = 1

End Sub

Private Sub cmdSet_Click()

Dim hkey As Long

Dim lvalue As Long

Dim cddata As Long

Dim retval As Long

lvalue = GetValue

retval = RegOpenKeyEx(HKEY_CURRENT_USER, "Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", 0, KEY_ALL_ACCESS, hkey)

retval = RegSetValueEx(hkey, "NoDriveTypeAutoRun", 0, REG_DWORD, lvalue, 4)

RegCloseKey hkey

If retval = 0 Then

MsgBox "设置已保存。", vbInformation, "提示"

Else

MsgBox "保存失败，错误代码：" + CStr(retval), vbExclamation, "错误"

End If

End Sub

Private Sub Form_Load()

Dim hkey As Long

Dim lvalue As Long

Dim cddata As Long

Dim retval As Long

retval = RegOpenKeyEx(HKEY_CURRENT_USER, "Software\Microsoft\Windows\CurrentVersion\Policies\Explorer", 0, KEY_ALL_ACCESS, hkey)

If retval 0 Then

MsgBox "打开注册表失败，错误代码：" + CStr(retval), vbExclamation, "错误"

End If

retval = RegQueryValueEx(hkey, "NoDriveTypeAutoRun", 0, REG_DWORD, lvalue, 4)

RegCloseKey hkey

If retval 0 Then

MsgBox "读取注册表失败，错误代码：" + CStr(retval), vbExclamation, "错误"

End If

ShowCheck (lvalue)

End Sub

Private Sub ShowCheck(lvalue As Long)

Check0.Value = lvalue Mod 2

lvalue = (lvalue - Check0.Value) / 2

Check1.Value = lvalue Mod 2

lvalue = (lvalue - Check1.Value) / 2

Check2.Value = lvalue Mod 2

lvalue = (lvalue - Check2.Value) / 2

Check3.Value = lvalue Mod 2

lvalue = (lvalue - Check3.Value) / 2

Check4.Value = lvalue Mod 2

lvalue = (lvalue - Check4.Value) / 2

Check5.Value = lvalue Mod 2

lvalue = (lvalue - Check5.Value) / 2

Check6.Value = lvalue Mod 2

End Sub

Private Function GetValue() As Long

GetValue = Check0.Value + Check1.Value * 2 + Check2.Value * 4 + Check3.Value * 8 + Check4.Value * 16 + Check5.Value * 32 + Check6.Value * 64 + 128

End Function

以上。

饿的老狼

求一份VB.NET的注册页面的代码

创建完相应的用户名，密码控件之后，输入以下代码：

Imports System.Data.OleDb

Public Class Form1

Private Sub cmdok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdok.Click

Dim m_username As String

Dim m_userpwd As String

Dim cmd_result As MsgBoxResult

Dim m_da As New OleDbDataAdapter

Dim m_ds As New DataSet

Dim m_command As New OleDbCommand

Dim strsql As String

m_username = txtusername.Text

m_userpwd = txtuserpwd.Text

strsql = " select * from user_info where username='" m_username "' and userpwd='" m_userpwd "'"

OleDbConnection1.Open()

m_command.CommandType = CommandType.Text

m_command.CommandText = strsql

m_command.Connection = OleDbConnection1

m_da.SelectCommand = m_command

m_da.Fill(m_ds, "user_info")

If m_ds.Tables("user_info").Rows.Count 0 Then

cmd_result = MsgBox("欢迎登录", MsgBoxStyle.OKOnly, "提示")

Else

MsgBox("登录失败，请确认用户名和密码")

End If

End Sub

End Class

VB.net 中如何实现序列号注册功能

思路是:

读取电脑硬件的信息,用随机数加工这些信息后在注册表中做个记录,用这个记录生成注册码送回给你,你按特定的方法生成序列号,你的小程序收到序列号后还原成数据,数据比较注册表中的记录,如果正确就加入第二部分注册的信息完成注册.你的程序每次打开时,先比对硬件信息-第一注册信息-第二注册信息,看这三者是否统一,不统一的就是使用期软件.

也可以省了第一注册信息,直接发硬件信息给你生成序列号,其他的相同.

如何用vb.net实现用户登陆界面的操作？

select * from t1 where name=** and password=** and style=**

如果查询到的表是空的，说明登陆错误，否则成功