VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   5190
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   7590
   LinkTopic       =   "Form1"
   ScaleHeight     =   5190
   ScaleWidth      =   7590
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "exit"
      Height          =   495
      Left            =   4920
      TabIndex        =   11
      Top             =   3840
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "calculate"
      Height          =   495
      Left            =   2040
      TabIndex        =   10
      Top             =   3840
      Width           =   1215
   End
   Begin VB.TextBox Texth 
      Height          =   615
      Left            =   2640
      TabIndex        =   9
      Top             =   2760
      Width           =   735
   End
   Begin VB.TextBox Textv 
      Height          =   495
      Left            =   4920
      TabIndex        =   7
      Top             =   1800
      Width           =   975
   End
   Begin VB.TextBox Texti 
      Height          =   615
      Left            =   1920
      TabIndex        =   5
      Top             =   1680
      Width           =   855
   End
   Begin VB.TextBox Texta 
      Height          =   735
      Left            =   4920
      TabIndex        =   3
      Top             =   720
      Width           =   1215
   End
   Begin VB.TextBox Texts 
      Height          =   495
      Left            =   2040
      TabIndex        =   1
      Top             =   720
      Width           =   735
   End
   Begin VB.Label Label5 
      Caption         =   "高差h"
      Height          =   495
      Left            =   1320
      TabIndex        =   8
      Top             =   2760
      Width           =   615
   End
   Begin VB.Label Label4 
      Caption         =   "棱鏡 高v"
      Height          =   495
      Left            =   3600
      TabIndex        =   6
      Top             =   1800
      Width           =   615
   End
   Begin VB.Label Label3 
      Caption         =   "儀器高i"
      Height          =   615
      Left            =   720
      TabIndex        =   4
      Top             =   1560
      Width           =   735
   End
   Begin VB.Label Label2 
      Caption         =   "豎直角a"
      Height          =   615
      Left            =   3600
      TabIndex        =   2
      Top             =   720
      Width           =   855
   End
   Begin VB.Label Label1 
      Caption         =   "距離s"
      Height          =   375
      Left            =   720
      TabIndex        =   0
      Top             =   720
      Width           =   735
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public Sub CmdCalculate_Click()
Dim h As Double
Dim s As Double
Dim i As Double
Dim v As Double
Dim a As Double
s = Texts.Text
a = Texta.Text
i = Texti.Text
v = Textv.Text
Call DmsToRad(a)
h = s * Tan(a) + i - v
Text5.Text = h
End Sub

Sub DmsToRad(a As Double)        '角度化弧度
Dim g_pi As Double
g_pi = 3.1415926535
        Dim t1 As Double
        Dim t2 As Double
        Dim T3 As Double
        Dim T4 As Double
        Dim T5 As Double
        Dim t As Double
        If Abs(a) < 1E-24 Then
            t = 1
        Else
             t = a / Abs(a)
        End If
        t1 = Abs(a)
        t2 = Int(t1 + 0.0000001)
        T3 = (t1 - t2) * 100#
        T4 = Int(T3 + 0.0000001)
        T5 = (t2 + T4 / 60# + (T3 - T4) / 36#) * g_pi / 180#
        a = T5 * t
End Sub

Private Sub Command2_Click()
Unload Me
End Sub