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有几个地方要注意：
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1、VB中的三角函数的角度全部是用弧度制表示的，如果是度数的话，应先乘以180再除以π转成弧度，再用函数计算结果。
2、VB中直接支持的三角函数有：Sin()、Cos()、Tan()，如果涉及到其它三角函数，可以从下面列出的代码中自己选择相应的函数：
Function
Sec(X)
As
Double
'正割
Sec
=
1
/
Cos(Angle)
End
Function
Function
Csc(X)
As
Double
'余割
Csc
=
1
/
Sin(Angle)
End
Function
Function
Cot(X)
As
Double
'余切
Cot
=
1
/
Tan(Angle)
End
Function
Function
ArcSin(X)
As
Double
'反正弦
ArcSin
=
Atn(X
/
Sqr(-X
*
X
+
1))
End
Function
Function
ArcCos(X)
As
Double
'反余弦
ArcCos
=
Atn(-X
/
Sqr(-X
*
X
+
1))
+
2
*
Atn(1)
End
Function
Function
ArcSec(X)
As
Double
'反正割
ArcSec
=
Atn(X
/
Sqr(X
*
X
-
1))
+
Sgn((X)
-
1)
*
(2
*
Atn(1))
End
Function
Function
ArcCsc(X)
As
Double
'反余割
ArcCsc
=
Atn(X
/
Sqr(X
*
X
-
1))
+
(Sgn(X)
-
1)
*
(2
*
Atn(1))
End
Function
Function
ArcCot(X)
As
Double
'反余切
ArcCot
=
Atn(X)
+
2
*
Atn(1)
End
Function
Function
HSin(X)
As
Double
'双曲正弦
HSin
=
(Exp(X)
-
Exp(-X))
/
2
End
Function
Function
HCos(X)
As
Double
'双曲余弦
HCos
=
(Exp(X)
+
Exp(-X))
/
2
End
Function
Function
HTan(X)
As
Double
'双曲正切
HTan
=
(Exp(X)
-
Exp(-X))
/
(Exp(X)
+
Exp(-X))
End
Function
Function
HSec(X)
As
Double
'双曲正割
HSec
=
2
/
(Exp(X)
+
Exp(-X))
End
Function
Function
HCsc(X)
As
Double
'双曲余割
HCsc
=
2
/
(Exp(X)
-
Exp(-X))
End
Function
Function
HCot(X)
As
Double
'双曲余切
HCot
=
(Exp(X)
+
Exp(-X))
/
(Exp(X)
-
Exp(-X))
End
Function
Function
HArcsin(X)
As
Double
'反双曲正弦
HArcsin
=
Log(X
+
Sqr(X
*
X
+
1))
End
Function
Function
HArccos(X)
As
Double
'反双曲余弦
HArccos
=
Log(X
+
Sqr(X
*
X
-
1))
End
Function
Function
HArctan(X)
As
Double
'反双曲正切
HArctan
=
Log((1
+
X)
/
(1
-
X))
/
2
End
Function
Function
HArcsec(X)
As
Double
'反双曲正割
HArcsec
=
Log((Sqr(-X
*
X
+
1)
+
1)
/
X)
End
Function
Function
HArccsc(X)
As
Double
'反双曲余割
HArccsc
=
Log((Sgn(X)
*
Sqr(X
*
X
+
1)
+
1)
/
X)
End
Function
Function
HArccot(X)
As
Double
'反双曲余切
HArccot
=
Log((X
+
1)
/
(X
-
1))
/
2
End
Function
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
没有啊
因为在 VB 里面都使用弧度（RAD）来计算 sin,cos,tan 等的值
而你要进行角度（DEG）计算
因此可以自己动手（丰衣足食）
如果先将你给的度数转化一下单位，就能简单一些
首先，需要声明函数(VB 6.0)
'==============================
'将度(DEG)转化为秒(DEG)
'返回值：与输入的度、分、秒等价的秒数
'==============================
Function DegreeToSecond(ByVal Degree, Optional ByVal Minute, Optional ByVal Second)
DegreeToSecond = (Degree * 60 + Minute) * 60 + Second
End Function
'==============================
'将秒(DEG)转化为度(DEG)
'返回值：与输入的秒数等价的度、分、秒
'注意：此函数返回一个数组，有三个元素组成
' 例如：
' 若 RV = SecondToDegree(12.345)
' 则 RV(0) 为度数
' 则 RV(1) 为分
' 则 RV(2) 为秒
'==============================
Function SecondToDegree(ByVal Second) As Variant()
Dim ReturnValue() As Variant
ReDim ReturnValue(2)
ReturnValue(0) = Fix(Second / 3600)
ReturnValue(1) = Fix((Second - Degree * 3600) / 60)
ReturnValue(2) = Fix((Second - Degree * 3600) - Minute * 60)
SecondToDegree = ReturnValue
End Function
然后，进行操作，例如：
Dim RV() As Variant
RV = SecondToDegree(DegreeToSecond(45, 23, 56) + DegreeToSecond(67, 45, 12))
MsgBox "Result:" RV(0) "°" RV(1) "'" RV(2) """"
如果是在 VB.NET 中，把所有的 Variant 参数和没有带类型的参数（在 VB6 中默认为 Variant）声明为 Object 类型即可