VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   4980
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   7800
   LinkTopic       =   "Form1"
   ScaleHeight     =   4980
   ScaleWidth      =   7800
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox Text1 
      BeginProperty DataFormat 
         Type            =   1
         Format          =   "# ##0,000000"
         HaveTrueFalseNull=   0
         FirstDayOfWeek  =   0
         FirstWeekOfYear =   0
         LCID            =   1049
         SubFormatType   =   1
      EndProperty
      Height          =   375
      Left            =   120
      TabIndex        =   2
      Text            =   "0"
      Top             =   1680
      Width           =   2175
   End
   Begin VB.CommandButton Command2 
      Caption         =   "Задача 2"
      Height          =   615
      Left            =   2520
      TabIndex        =   1
      Top             =   1560
      Width           =   1575
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Задача 1"
      Height          =   615
      Left            =   2520
      TabIndex        =   0
      Top             =   600
      Width           =   1575
   End
   Begin VB.Label Label1 
      Alignment       =   2  'Center
      Caption         =   "Задайте значение Х"
      Height          =   255
      Left            =   120
      TabIndex        =   3
      Top             =   1320
      Width           =   2055
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_Click()
    Const e = 4.7
    Const DB = 0.4
    Const DH = 0.5
    Dim C As Double, l As Double
    Dim s As String
    s = ""
    For l = 1 To 3
        C = (0.241 * e * l + 0.08 * DH) / Log(DH / DB) * Log(10)
        s = s & "l=" & CStr(l) & ", C=" & Format(C, "##0.000") & vbCrLf
    Next l
    MsgBox s, vbInformation, "Результаты расчета"
End Sub

Private Sub Command2_Click()
    Dim x As Double, y As Double, Pi As Double
    Pi = 4 * Atn(1)
    x = CDbl(Text1.Text)
    Select Case x
    Case Is < 0
        y = -x
    Case Is <= 1
        y = x * (x - 1)
    Case Else
        y = x ^ 2 - Sin(Pi * x ^ 2)
    End Select
    MsgBox "x=" & CStr(x) & ", y=" & Format(y, "# ##0.00000"), vbInformation, "Результат"
End Sub