Калькулятор. Какая нужно команда?

Dim x As Currency, y As Currency, z As Currency, znak As Integer
Private Sub Command11_Click()
Text1.Text = Text1.Text + ","
End Sub
Private Sub Command12_Click()
z = Text1.Text
z = z * (-1)
Text1.Text = z
End Sub
Private Sub Command13_Click()
x = Text1.Text
Text1.Text = ""
znak = 1
End Sub
Private Sub Command14_Click()
x = Text1.Text
Text1.Text = ""
znak = 2
End Sub
Private Sub Command15_Click()
x = Text1.Text
Text1.Text = ""
znak = 3
End Sub
Private Sub Command16_Click()
x = Text1.Text
Text1.Text = ""
znak = 4
End Sub
Private Sub Command17_Click()
y = Text1.Text
If znak = 1 Then z = x + y
If znak = 2 Then z = x - y
If znak = 3 Then z = x * y
If znak = 4 Then z = x / y
Text1.Text = z
End Sub
Private Sub Command18_Click()
x = 0
y = 0
z = 0
znak = 0
Text1.Text = ""
End Sub
Private Sub Command1_Click()
Text1.Text = Text1.Text + "1"
End Sub
Private Sub Command10_Click()
Text1.Text = Text1.Text + "0"
End Sub
Private Sub Command2_Click()
Text1.Text = Text1.Text + "2"
End Sub
Private Sub Command3_Click()
Text1.Text = Text1.Text + "3"
End Sub
Private Sub Command4_Click()
Text1.Text = Text1.Text + "4"
End Sub
Private Sub Command5_Click()
Text1.Text = Text1.Text + "5"
End Sub
Private Sub Command6_Click()
Text1.Text = Text1.Text + "6"
End Sub
Private Sub Command7_Click()
Text1.Text = Text1.Text + "7"
End Sub
Private Sub Command8_Click()
Text1.Text = Text1.Text + "8"
End Sub
Private Sub Command9_Click()
Text1.Text = Text1.Text + "9"
End Sub

Option Explicit
Dim VVoD As Boolean
 
Private Sub Command17_Click()
y = Text1.Text
If znak = 1 Then z = x + y
If znak = 2 Then z = x - y
If znak = 3 Then z = x * y
If znak = 4 Then z = x / y
Text1.Text = z
VVoD = True
End Sub
 
Private Sub Комманда1_Click(Index As Integer)
If VVoD Then
    Text1.Text = Index
    VVoD = False
Else
    Text1.Text = Text1.Text & Index
End If
End Sub

Private Sub Form_Load()
    On Error Resume Next
    For f = 0 To 10
        Load Command1(f)
        'Задание координат
        Command1(f).Move Command1(f - 1).Left, Command1(f - 1).Top + _
        Command1(f - 1).Height
    Next

        Command1(f - 1).Height
        Command1(f).Visible = True
    Next

        Command1(j(f - 1)).Height
        Command1(j(f)).Visible = True
    Next

Private Sub Command1_KeyUp(Index As Integer, KeyCode As Integer, Shift As Integer)
    
End Sub

On Error Resume Next
    For f = 0 To 10
        Load Command1(f)
        Command1(f).Move Command1(f - 1).Left, Command1(f - 1).Top + _
        Command1(f - 1).Height
    Next
        Command1(j(f - 2)).Height
        Command1(j(f)).Visible = True
    Next

открывающий оператор1
    выражение1
    открывающий оператор2
        выражение2
    закрывающий оператор2
закрывающий оператор1