Write a Visual Basic program to implement the find and replace dialogue box for text-box

Design an application in Visual Basic to implement the find and replace dialogue box for text-box control with multiple line of text with 3 option buttons and check boxes

Design window of form:-

Code:-
Dim txt As String
Dim s, l, r As Integer
Private Sub Check1_Click(Index As Integer)
    If Check1(0).Value = 1 Then
        Text1.Font.Bold = True
    Else
        Text1.Font.Bold = False
    End If
    If Check1(1).Value = 1 Then
        Text1.Font.Italic = True
    Else
        Text1.Font.Italic = False
    End If
    If Check1(2).Value = 1 Then
        Text1.Font.Underline = True
    Else
        Text1.Font.Underline = False
    End If
End Sub

Private Sub cmdClear_Click()
Option1(0).Value = False
Option2(1).Value = False
Option3(2).Value = False

Check1(0).Value = 0
Check2(1).Value = 0
Check3(2).Value = 0
End Sub

Private Sub cmdExit_Click()
Unload Me
End Sub

Private Sub cmdFind_Click()
txt = InputBox("enter Text to find")
l = Len(txt)
r = InStr(1, Text1.Text, txt, vbTextCompare)
Text1.SelStart = r - 1
Text1.SelLength = l
End Sub

Private Sub cmdFindNext_Click()
If r <> Len(Text1.Text) Then
    r = InStr(r + 1, Text1.Text, txt, vbTextCompare)
    Text1.SelStart = r - 1
    Text1.SelLength = l
Else
    MsgBox "No more Text", vbInformation, "Find"
End If
End Sub

Private Sub cmdReplace_Click()
txt1 = InputBox("Enter text to replace")
Text1.Text = Replace(Text1.Text, txt, txt1)

End Sub

Private Sub Form_Load()
Text1.Text = "Design an application in VB to implement the find and replace dialogue " & _
            "box for textbox control with multiple line of text with 3 option buttons and check boxes and"
End Sub

Private Sub Option1_Click(Index As Integer)
If Option1(0).Value = True Then
    Text1.Font.Name = "Arial"
ElseIf Option1(1).Value = True Then
    Text1.Font.Name = "Arial Black"
Else
    Text1.Font.Name = "Times New Roman"
End If
End Sub


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OUTPUT