vb有哪些版本？

比较有名的有

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VB1.0 --VB5.0- VB 6.0

VB2005 VB2008 VB 2010

VB6 有学习版，专业版，企业版

VB.net2010 操作注册表

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

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

VB.NET2010

"" 就是空字符串。执行 Text1.Text = "" 后，文本框 Text1 就被清空了。

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