Public Sub TextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
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Dim SplitStr As String = ","
Dim SelectionStart As Integer = sender.SelectionStart
Dim TextLength As Integer = sender.Text.Length
'------------------------------------------------------------------
Select Case Asc(e.KeyChar)
Case Is = 8 '"回删"
Dim str As String = sender.text
Dim Array = Split(sender.text, ",", -1)
If sender.SelectionStart = str.Length Then
If str.Contains(",") Then
Dim text = ""
For x = 0 To UBound(Array) - 1
If text = "" Then
text += Array(x)
Else
text += "," + Array(x)
End If
Next
sender.text = text
sender.SelectionStart = text.Length
e.KeyChar = Chr(0)
End If
End If
Case Asc("0") To Asc("9") '" 0 to 9 "
e.KeyChar = e.KeyChar
Case Is = 44, 45 '","
Select Case TextLength
Case Is = 0
e.KeyChar = Chr(0)
Case Else
Select Case SelectionStart
Case 0
e.KeyChar = Chr(0)
Case 1 To TextLength - 1
If Mid(sender.text, SelectionStart, 1) = SplitStr Or Mid(sender.text, SelectionStart + 1, 1) = SplitStr Then
e.KeyChar = Chr(0)
Else
e.KeyChar = e.KeyChar
End If
Case TextLength
If Mid(sender.text, SelectionStart, 1) = SplitStr Then
e.KeyChar = Chr(0)
Else
e.KeyChar = e.KeyChar
End If
End Select
End Select
Case Else
e.KeyChar = Chr(0)
End Select
End Sub
这是我的程序中复制过来的,只能输入数据字与逗号还有下划线,你查一下F和J的Ass吗是多少,改写一下就OK
最简单的加速运动示例，直接拷贝代码，即可用方向键控制控件移动
Public Class 最简单的加速运动
Dim 左右, 上下 As Integer
Dim X, Y, VX, VY, VA As Double
Dim WithEvents 时钟 As New Timer
Dim WithEvents 移动控件 As New Label
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.KeyPreview = True
VA = 0.5
X = 300.0
Y = 300.0
移动控件.BackColor = Color.MediumPurple
移动控件.Size = New Size(60, 60)
Controls.Add(移动控件)
时钟.Interval = 25
时钟.Enabled = True
End Sub
Private Sub Form1_KeyDown(sender As Object, e As KeyEventArgs) Handles MyBase.KeyDown
If e.KeyCode = Keys.Up Then 上下 = -1
If e.KeyCode = Keys.Down Then 上下 = 1
If e.KeyCode = Keys.Left Then 左右 = -1
If e.KeyCode = Keys.Right Then 左右 = 1
End Sub
Private Sub Form1_KeyUp(sender As Object, e As KeyEventArgs) Handles MyBase.KeyUp
If e.KeyCode = Keys.Up Then 上下 = 0
If e.KeyCode = Keys.Down Then 上下 = 0
If e.KeyCode = Keys.Left Then 左右 = 0
If e.KeyCode = Keys.Right Then 左右 = 0
End Sub
Private Sub 时钟_Tick(sender As Object, e As EventArgs) Handles 时钟.Tick
VX = Math.Min(VX + 左右 * VA, 10)
VY = Math.Min(VY + 上下 * VA, 10)
X += VX
Y += VY
If X 0 Then X = 2 : VX = -VX
If Y 0 Then Y = 2 : VY = -VY
If X Width - 移动控件.Width Then X = Width - 移动控件.Width - 2 : VX = -VX
If Y Height - 移动控件.Height Then Y = Height - 移动控件.Height - 2 : VY = -VY
移动控件.Location = New Point(X, Y)
End Sub
End Class
.net的代码真木有写过。
VB 可以屏蔽 包括ctrl+alt+del在内的所有键盘按键消息
其实你只要后台截获按键的消息后，直接屏蔽掉就可以了。
VB代码我有 net木有。
这是不可能完成的任务，.NET平台不存在开发驱动的能力，你要想在驱动层对键盘操作，最好使用C,C++来实现，比较方便。 像现在一些比较出名的网络游戏，都是在驱动层进行保护的。
长按你可以用计时器来实现啊，写个例子：
Private blCtrl As Boolean = False
Private Sub Form1_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Keys.LControlKey Then blCtrl = True
End Sub
Private Sub Form1_KeyUp(sender As Object, e As KeyEventArgs) Handles Me.KeyUp
If e.KeyCode = Keys.LControlKey Then blCtrl = False
End Sub
然后你可以在计时器里检测blCtrl的状态来确定，不知道你的具体情况是什么样的
总之是用一个布尔变量来记录按键状态，配合计时器来达到你想要的功能
