eval.frm

不错的一个VB菜单设计 界面和功能都不错

VERSION 5.00
Object = "*\A..\SOURCE\FAST2002.vbp"
Begin VB.Form frmEvaluator 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "Math Evaluator"
   ClientHeight    =   1845
   ClientLeft      =   2445
   ClientTop       =   2805
   ClientWidth     =   5940
   ClipControls    =   0   'False
   Icon            =   "Eval.frx":0000
   LinkTopic       =   "Form1"
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   1845
   ScaleWidth      =   5940
   Begin VB.TextBox txtExpression 
      Height          =   825
      Left            =   120
      MultiLine       =   -1  'True
      TabIndex        =   1
      Top             =   360
      Width           =   5700
   End
   Begin VB.CommandButton cmdEvaluate 
      Caption         =   "&Calc"
      Default         =   -1  'True
      Height          =   375
      Left            =   4725
      TabIndex        =   3
      Top             =   1350
      Width           =   1095
   End
   Begin FLWGraphMath.FWSolver objSolver 
      Left            =   3675
      Top             =   1305
      _ExtentX        =   820
      _ExtentY        =   820
   End
   Begin VB.Label lblResult 
      AutoSize        =   -1  'True
      Caption         =   "0"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   9.75
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H80000002&
      Height          =   240
      Left            =   915
      TabIndex        =   4
      Top             =   1395
      Width           =   135
   End
   Begin VB.Label lblLabel 
      AutoSize        =   -1  'True
      Caption         =   "Result:"
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   9.75
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   240
      Index           =   1
      Left            =   135
      TabIndex        =   2
      Top             =   1395
      Width           =   735
   End
   Begin VB.Label lblLabel 
      Caption         =   "Expression"
      Height          =   255
      Index           =   0
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   1935
   End
End
Attribute VB_Name = "frmEvaluator"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub cmdEvaluate_Click()
  objSolver.Expression = txtExpression
  If objSolver.Solve Then
    lblResult = objSolver.Solution
  Else
    lblResult = "Error"
    Call MsgBox(objSolver.GetErrorDescription, _
                vbOKOnly, "Error " & objSolver.GetError)
  End If
End Sub

Private Sub Form_Load()
  objSolver.Symbol("one") = 1
  
  txtExpression = "( MyFunc(1 + 2, 2) * one + sin(PI) )"
End Sub

Private Sub objSolver_UserFunction(ByVal strFunction As String, ByVal cllParameters As Collection, vntReturnValue As Variant, blnProcessed As Boolean)
  If strFunction = "MYFUNC" Then
    If cllParameters.Count = 2 Then
      blnProcessed = True
      vntReturnValue = cllParameters(1) * cllParameters(2)
    End If
  End If
End Sub