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Private Sub PictureBox2_Paint(sender As Object, e As PaintEventArgs) Handles PictureBox2.Paint
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Dim points As New List(Of Point)
points.Add(New Point(0, 0))
points.Add(New Point(1, 10))
points.Add(New Point(3, 15))
points.Add(New Point(14, 0))
points.Add(New Point(20, 60))
points.Add(New Point(40, 20))
points.Add(New Point(70, 50))
e.Graphics.DrawCurve(Pens.Red, points.ToArray)
End Sub
供参考，points可设为全局变量，那样add随便在哪增加，想要看见看上去动态的图，那就在新增完n个后，继续增加n+1个之时，放弃points中的第一个。
scale(x1,y1)-(x2,y2)
你只要记住，这里的x1,y1是左上角的坐标，x2,y2是右下角的坐标，通过这两个点的坐标设定，就可以决定坐标原点的位置以及坐标轴的方向了，比如
Scale (-300,200)-(300,-200)
以上是把坐标原点设在窗体中心，x轴长600，方向从左到右，y轴长400，方向从下向上。
Scale (800,0)-(0,600)
以上是把坐标原点设在窗体右上角，x轴长800，方向从右到左，y轴长600，方向从上向下。
下面说坐标轴和原点的标示法：
假定自定义坐标设为：
Scale (-300, 200)-(300, -200)
则
Line (-300, 0)-(300, 0) '画x轴
Line (0, 200)-(0, -200) '画y轴
CurrentX = 290
CurrentY = -5
Print "x" '标示x轴
CurrentX = 5
CurrentY = 200
Print "y" '标示y轴
CurrentX = 5
CurrentY = -5
Print "0" '标示原点
Private Declare Function GetCursorPos Lib "user32" (ByRef lpPoint As POINTAPI) As Long '全屏坐标声明
Private Declare Function ScreenToClient Lib "user32.dll" (ByVal hwnd As Int32, ByRef lpPoint As POINTAPI) As Int32 '窗口坐标声明
Private Structure POINTAPI '声明坐标变量
Public x As Int32 '声明坐标变量为32位
Public y As Int32 '声明坐标变量为32位
End Structure
'以上是声明部分
'以下是窗口部分
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick '用时钟控件来取坐标,窗口上放个Timer组件,Enabled为允许,周期为10到100毫秒均可
Dim P As POINTAPI '声明坐标变量
Dim xx, yy '声明转换要用到的变量
GetCursorPos(P) '获取鼠标在屏幕中的位置
ScreenToClient(Me.Handle.ToInt32, P) '转换为本窗体的坐标
xx = P.x.ToString '把X转换成能显示到文本框的字符串格式
yy = P.y.ToString '把Y转换成能显示到文本框的字符串格式
TextBox1.Text = xx + "和" + yy '文本框的内容为X坐标和Y坐标
End Sub
窗体上放一个textbox 两条line 一个label 代码粘贴 运行 即见效果
'*************************************************************************
'**工程名称：平面座标
'**说 明：小鸟工作室 版权所有2007 - 2008(C)1
'**创 建 人：秋色烽火
'**日 期：2007-12-18 14:08:15
'**版 本：V1.0.0
'*************************************************************************
Const DPITCH = 300 '点距
Dim WithEvents oControlx1 As Line
Dim WithEvents oControlx2 As Line
Dim WithEvents oControly1 As Line
Dim WithEvents oControly2 As Line
Dim WithEvents oControlShape As Shape
Dim WithEvents oControlPixinfo As Label
Dim DPCound%, PixID%, PixBackColor, dotx%, doty%
Private Sub Form_Load()
Me.Caption = "平面座标 - by 秋色烽火[小鸟工作室]"
Me.Height = 9300
Me.Width = 9300
Line1.X1 = 150
Line1.X2 = Me.Width - 150
Line1.Y1 = Me.Height / 2
Line1.Y2 = Line1.Y1
Line2.Y1 = 150
Line2.Y2 = Me.Height - 150
Line2.X1 = Me.Width / 2
Line2.X2 = Line2.X1
Label1.Width = 255
Label1.Height = 255
Label1.AutoSize = ture
Label1.BackStyle = 0
Label1.FontItalic = True
Label1.FontBold = True
Label1.FontSize = 10
Label1.ForeColor = HFF
Label1.Caption = "O"
Label1.Left = Me.Width / 2 + Label1.Width - 100
Label1.Top = Me.Height / 2 - Label1.Height
Text1.Text = ""
Call AddLine
Text1.ToolTipText = "请输入整数座标(x,y) 中间用英文逗号分隔~~~,双击文本框或回车开始标注" vbCrLf " 右击显示帮助信息 " vbCrLf "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~"
PixID = 0
End Sub
Sub AddLine()
DPCound = (Me.Width - 300) / DPITCH - 2
For i = DPCound \ 2 + 1 To DPCound
Set oControlx1 = Controls.Add("VB.Line", "lineW" i, Me)
Set oControlx2 = Controls.Add("VB.Line", "lineW" DPCound \ 2 - (i - (DPCound \ 2 + 1)), Me)
Set oControly1 = Controls.Add("VB.Line", "lineH" i, Me)
Set oControly2 = Controls.Add("VB.Line", "lineH" DPCound \ 2 - (i - (DPCound \ 2 + 1)), Me)
With oControlx1
.Visible = True '显示
.X1 = Me.Width / 2 + (i - DPCound \ 2) * DPITCH
.X2 = Me.Width / 2 + (i - DPCound \ 2) * DPITCH
.Y1 = Me.Height / 2 - 60
.Y2 = Me.Height / 2 + 60
End With
With oControlx2
.Visible = True '显示
.X1 = Me.Width / 2 - (i - DPCound \ 2) * DPITCH
.X2 = Me.Width / 2 - (i - DPCound \ 2) * DPITCH
.Y1 = Me.Height / 2 - 60
.Y2 = Me.Height / 2 + 60
End With
With oControly1
.Visible = True '显示
.Y1 = Me.Height / 2 + (i - DPCound \ 2) * DPITCH
.Y2 = Me.Height / 2 + (i - DPCound \ 2) * DPITCH
.X1 = Me.Width / 2 - 60
.X2 = Me.Width / 2 + 60
End With
With oControly2
.Visible = True '显示
.Y1 = Me.Height / 2 - (i - DPCound \ 2) * DPITCH
.Y2 = Me.Height / 2 - (i - DPCound \ 2) * DPITCH
.X1 = Me.Width / 2 - 60
.X2 = Me.Width / 2 + 60
End With
Next
End Sub
Sub AddPix()
If InStr(Text1.Text, ",") 0 Then
If IsNumeric(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) And IsNumeric(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text))) Then
If CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) = DPCound \ 2 And CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) = -1 * DPCound \ 2 Then
PixID = PixID + 1
Set oControlShape = Controls.Add("VB.Shape", "Pix" PixID, Me)
Set oControlPixinfo = Controls.Add("VB.Label", "Pixinfo" PixID, Me)
With oControlShape
.Visible = True '显示
.Shape = 3
'.BorderColor = HFF
.BackColor = HFF 'RGB(Int(Rnd * 255), Int(Rnd * 255), Int(Rnd * 255)) 'HFF
.BackStyle = 1
.BorderStyle = 0
.Width = 75
.Height = 75
.Left = Me.Width / 2 + CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) * DPITCH
.Top = Me.Height / 2 - CInt(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text))) * DPITCH
dotx = .Left
doty = .Top
PixBackColor = .BackColor
End With
With oControlPixinfo
.Visible = True '显示
.BackStyle = 0
' .FontItalic = True
'.FontBold = True
.FontSize = 9
.ForeColor = HFF 'PixBackColor 'HFF
.Caption = "[" PixID "]" CStr(CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1))) "," CInt(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text)))
.Width = 1000
.Height = 255
.Left = dotx
.Top = doty - .Height
.AutoSize = ture
End With
Text1.Text = ""
Else
MsgBox "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~", , "错误"
Text1.Text = ""
End If
Else
MsgBox "座标请使用数字输入", , "错误"
Text1.Text = ""
End If
Else
MsgBox "输入的座标请使用英文逗号 , 进行分隔", , "错误"
Text1.Text = ""
End If
End Sub
Sub init()
If PixID 0 Then
If MsgBox("确实要清空所有标注点吗？", vbOKCancel + vbInformation + vbDefaultButton2 + vbMsgBoxSetForeground + vbSystemModal, "信息！") = vbOK Then
For i = 1 To PixID
Controls.Remove "Pix" i
Controls.Remove "Pixinfo" i
Next
PixID = 0
End If
End If
End Sub
Private Sub Text1_DblClick()
Call AddPix
End Sub
Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode = 13 Then
Call AddPix
End If
End Sub
Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
MsgBox "请输入整数座标(x,y) 中间用英文逗号分隔~~~,双击文本框或回车开始标注" vbCrLf "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~" vbCrLf "中键清空所有创建的座标", , "帮助"
End If
If Button = 4 Then
Call init
End If
End Sub
'好玩的东东
'****************************
'如果加上下面的就好罗
'定时设为500
'Dim a, b As Integer
'a = 14
'b = 14
'Private Sub Timer1_Timer()
'Text1.Text = a "," b
'a = a - 1
'b = b - 1
'Call Text1_KeyDown(13, 1)
'End Sub