1. 1.
    -1
    Private Sub Command1_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "1"
    End Sub

    Private Sub Command1_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command1.BackColor = &H80000000
    End Sub

    Private Sub Command10_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "0"
    End Sub

    Private Sub Command10_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command10_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command10.BackColor = &H80000000
    End Sub

    Private Sub Command11_Click()
    a = Val(Text1.Text)
    Text1.Text = " "
    m = 1
    f = 0
    Command12.Enabled = False
    Command13.Enabled = False
    Command14.Enabled = False
    End Sub

    Private Sub Command11_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command11_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command11.BackColor = &H80000000
    End Sub

    Private Sub Command12_Click()
    a = Val(Text1.Text)
    Text1.Text = " "
    m = 2
    f = 0
    Command11.Enabled = False
    Command13.Enabled = False
    Command14.Enabled = False
    End Sub

    Private Sub Command12_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command12_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command12.BackColor = &H80000000
    End Sub

    Private Sub Command13_Click()
    a = Val(Text1.Text)
    Text1.Text = " "
    m = 3
    f = 0
    Command11.Enabled = False
    Command12.Enabled = False
    Command14.Enabled = False
    End Sub

    Private Sub Command13_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command13.BackColor = &H80000000
    End Sub

    Private Sub Command14_Click()
    a = Val(Text1.Text)
    Text1.Text = " "
    m = 4
    f = 0
    Command12.Enabled = False
    Command13.Enabled = False
    Command11.Enabled = False
    End Sub

    Private Sub Command14_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command14_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command14.BackColor = &H80000000
    End Sub

    Private Sub Command15_Click()
    b = Val(Text1.Text)
    If (m = 1) Then
    Text1.Text = " "
    Text1.Text = a + b
    End If
    If (m = 2) Then
    Text1.Text = " "
    Text1.Text = a - b
    End If
    If (m = 3) Then
    Text1.Text = " "
    Text1.Text = a * b
    End If
    If (m = 4) Then
    Text1.Text = " "
    Text1.Text = a / b
    End If
    m = 0
    Command11.Enabled = True
    Command12.Enabled = True
    Command13.Enabled = True
    Command14.Enabled = True
    End Sub

    Private Sub Command15_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command15_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command15.BackColor = &H80000000
    End Sub

    Private Sub Command16_Click()
    Text1.Text = " "
    End Sub

    Private Sub Command16_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command16_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command16.BackColor = &H80000000
    End Sub

    Private Sub Command17_Click()
    End
    End Sub

    Private Sub Command17_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command17.BackColor = &H80000000
    End Sub

    Private Sub Command18_Click()
    k = Val(Text1.Text)
    Text1.Text = Sqr(k)
    End Sub

    Private Sub Command18_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command18_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command18.BackColor = &H80000000
    End Sub

    Private Sub Command19_Click()
    ka = Val(Text1.Text)
    Text1.Text = ka * ka
    End Sub

    Private Sub Command19_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command19_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command19.BackColor = &H80000000
    End Sub

    Private Sub Command2_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "2"
    End Sub

    Private Sub Command2_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command2.BackColor = &H80000000
    End Sub

    Private Sub Command3_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "3"
    End Sub

    Private Sub Command3_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command3.BackColor = &H80000000
    End Sub

    Private Sub Command4_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "4"
    End Sub

    Private Sub Command4_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command4_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command4.BackColor = &H80000000
    End Sub

    Private Sub Command5_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "5"
    End Sub

    Private Sub Command5_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command5_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command5.BackColor = &H80000000
    End Sub

    Private Sub Command6_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "6"
    End Sub

    Private Sub Command6_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command6_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command6.BackColor = &H80000000
    End Sub

    Private Sub Command7_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "7"
    End Sub

    Private Sub Command7_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command7_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command7.BackColor = &H80000000
    End Sub

    Private Sub Command8_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "8"
    End Sub

    Private Sub Command8_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command8_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command8.BackColor = &H80000000
    End Sub

    Private Sub Command9_Click()
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    Text1.Text = Text1.Text + "9"
    End Sub

    Private Sub Command9_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Command9_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command9.BackColor = &H80000000
    End Sub

    Private Sub Form_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    End Sub

    Private Sub Form_Load()
    f = 1
    m = 0
    End Sub

    Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Command1.BackColor = &H8000000F
    Command2.BackColor = &H8000000F
    Command3.BackColor = &H8000000F
    Command4.BackColor = &H8000000F
    Command5.BackColor = &H8000000F
    Command6.BackColor = &H8000000F
    Command7.BackColor = &H8000000F
    Command8.BackColor = &H8000000F
    Command9.BackColor = &H8000000F
    Command10.BackColor = &H8000000F
    Command11.BackColor = &H8000000F
    Command12.BackColor = &H8000000F
    Command13.BackColor = &H8000000F
    Command14.BackColor = &H8000000F
    Command15.BackColor = &H8000000F
    Command16.BackColor = &H8000000F
    Command18.BackColor = &H8000000F
    Command19.BackColor = &H8000000F
    End Sub

    Private Sub Text1_KeyPress(KeyAscii As Integer)
    If (KeyAscii = 27) Then
    End
    End If
    If (f = 0) Then
    Text1.Text = " "
    f = 1
    End If
    If (KeyAscii = 43) Then
    a = Val(Text1.Text)
    Text1.Text = " "
    f = 0
    m = 1
    End If
    If (KeyAscii = 45) Then
    a = Val(Text1.Text)
    Text1.Text = " "
    f = 0
    m = 2
    End If
    If (KeyAscii = 42) Then
    a = Val(Text1.Text)
    Text1.Text = " "
    f = 0
    m = 3
    End If
    If (KeyAscii = 47) Then
    a = Val(Text1.Text)
    Text1.Text = " "
    f = 0
    m = 4
    End If
    If (KeyAscii = 13) Then
    b = Val(Text1.Text)
    If (m = 1) Then
    Text1.Text = " "
    Text1.Text = a + b
    End If
    If (m = 2) Then
    Text1.Text = " "
    Text1.Text = a - b
    End If
    If (m = 3) Then
    Text1.Text = " "
    Text1.Text = a * b
    End If
    If (m = 4) Then
    Text1.Text = " "
    Text1.Text = a / b
    End If
    m = 0
    End If
    If (Text1.Text = "+") Then
    Text1.Text = " "
    End If
    If (KeyAscii = 25) Then
    Text1.Text = " "
    End If
    End Sub
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