vb.net编写控件 vb控件代码
vb.net 如何编写一个程序，能自由创建控件（比如说创建textbox)，就像设计时一样
Dim Mouse_X, Mouse_Y As Integer, Mouse_ZF As New PictureBox
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Private Sub Form1_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown
If e.Button = Windows.Forms.MouseButtons.Left Then
Mouse_X = e.X
Mouse_Y = e.Y
Mouse_ZF.Location = New Point(e.X - 1, e.Y - 1)
Mouse_ZF.Size = New Size(0, 0)
Mouse_ZF.BorderStyle = BorderStyle.FixedSingle
Mouse_ZF.BackColor = Color.Silver
Mouse_ZF.Visible = True
Mouse_ZF.Name = "ZF"
Me.Controls.Add(Mouse_ZF)
Else
Mouse_X = 0
Mouse_Y = 0
End If
End Sub
Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseMove
If e.Button = Windows.Forms.MouseButtons.Left Then
Mouse_ZF.Size = New Size(e.X - Mouse_X, e.Y - Mouse_Y)
End If
End Sub
Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseUp
If e.Button = Windows.Forms.MouseButtons.Left Then
Mouse_ZF.Visible = False
Dim TB As New TextBox
TB.Location = New Point(Mouse_X + 1, Mouse_Y + 1)
TB.Multiline = True
TB.Size = Mouse_ZF.Size
Me.Controls.Remove(Me.Controls.Item("ZF"))
Me.Controls.Add(TB)
End If
End Sub
VB.NET 如何做 控件
用vs.net创建控件项目，其他的和vb类似...
新建项目-windows 窗体控件库
VB.net 如何编写用户控件？
Public Class UserControl1
#Region "变量"
Dim Down_Color As Color = Color.Blue
Dim UP_Color As Color = Color.Gray
Dim Mode As Short = 0
Dim flag As Boolean
Dim offset_X As Integer
Dim offset_Y As Integer
Dim Mouse_P As Point
#End Region
#Region "属性"
'按下颜色
Public Property _DownColor As Color
Get
Return Down_Color
End Get
Set(ByVal value As Color)
Down_Color = value
End Set
End Property
'弹起颜色
Public Property _UpColor As Color
Get
Return UP_Color
End Get
Set(ByVal value As Color)
UP_Color = value
End Set
End Property
'滑动模式 0-横 1-竖
Public Property _Mode As Short
Get
Return Mode
End Get
Set(ByVal value As Short)
Mode = value
End Set
End Property
#End Region
Private Sub UserControl1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.BackColor = UP_Color
End Sub
'鼠标按下
Private Sub UserControl1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
Me.BackColor = Down_Color
Mouse_P = e.Location
flag = True
End Sub
'鼠标移动
Private Sub UserControl1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseMove
If flag = False Then Exit Sub
Select Case Mode
Case 0 '横向·
offset_X = e.X - Mouse_P.X
If Me.Location.X + offset_X + Me.Width = Me.ParentForm.Width Or Me.Location.X + offset_X = 0 Then
flag = False
Else
Me.Location = New Point(Me.Location.X + offset_X, Me.Location.Y)
End If
Case 1 '竖向·
offset_Y = e.Y - Mouse_P.Y
If Me.Location.Y + offset_Y + Me.Height + 30 = Me.ParentForm.Height Or Me.Location.Y + offset_Y = 0 Then
flag = False
Else
Me.Location = New Point(Me.Location.X, Me.Location.Y + offset_Y)
End If
End Select
End Sub
'鼠标弹起
Private Sub UserControl1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseUp
Me.BackColor = UP_Color
flag = False
End Sub
End Class
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