অাজ শিখব একটি ক্যালকুলেটর তৈরি।প্রথেম...... করি। একটি ফম....করি। একটি টেষ্কবক্র নিব। ২৩ টি কমান্ড বাটন নিব। কমান্ড বাটন এর প্রতিটির ক্যাপশেন গিয়ে 0-9এবং অন্যান্ন চিন্হগুলো দিব।এখন কমান্ড বাটনে নিচের কোড লিখব। এখন রান করি, ভালভাবে রান করলে .exeতৈরি করুন। File যান Click করুন make exe. নাম দিন, ব্যাস উপভোগ করুন। মন্তব্য করতে ভুলবেন না।

Code:

Dim co As TextBox
Dim no1 As Double
Dim no2 As Double
Dim operator As String
Private Sub Command1_Click()
no2 = Val(Text1.Text)
If operator = "+" Then
Text1.Text = Val(no1) + Val(no2)
ElseIf operator = "-" Then
Text1.Text = Val(no1) - Val(no2)
ElseIf operator = "*" Then
Text1.Text = Val(no1) * Val(no2)
ElseIf operator = "/" Then
Text1.Text = Val(no1) / Val(no2)
End If
End Sub

Private Sub Command10_Click()
Unload Me
End Sub

Private Sub Command11_Click()
no1 = Val(Text1.Text)
operator = "*"
Text1.Text = ""
End Sub

Private Sub Command12_Click()
no1 = Val(Text1.Text)
operator = "/"
Text1.Text = ""
End Sub

Private Sub Command13_Click()
Text1.Text = Text1.Text & "9"
End Sub

Private Sub Command14_Click()
Text1.Text = Text1.Text & "8"
End Sub

Private Sub Command15_Click()
Text1.Text = Text1.Text & "7"
End Sub

Private Sub Command16_Click()
Text1.Text = Text1.Text & "6"
End Sub

Private Sub Command17_Click()
Text1.Text = Text1.Text & "5"
End Sub

Private Sub Command18_Click()
Text1.Text = Text1.Text & "4"
End Sub

Private Sub Command19_Click()
Text1.Text = Text1.Text & "3"
End Sub

Private Sub Command2_Click()
no1 = Val(Text1.Text)
operator = "+"
Text1.Text = ""
End Sub

Private Sub Command20_Click()
Text1.Text = Text1.Text & "2"
End Sub

Private Sub Command21_Click()
Text1.Text = Text1.Text & "1"
End Sub

Private Sub Command22_Click()
Text1.Text = Text1.Text & "0"
End Sub

Private Sub Command23_Click()
Text1.Text = Val(Text1.Text) * (-1)
End Sub

Private Sub Command3_Click()
Text1.Text = Text1.Text & "."
End Sub

Private Sub Command4_Click()
no1 = Val(Text1.Text)
operator = "-"
Text1.Text = ""
End Sub

Private Sub Command5_Click()
Text1.Text = 1 / Val(Text1.Text)
End Sub

Private Sub Command6_Click()
no2 = Val(Text1.Text)
If operator = "+" Then
Text1.Text = Val(no1) + Val(no2)
ElseIf operator = "-" Then
Text1.Text = Val(no1) - Val(no2)
ElseIf operator = "*" Then
Text1.Text = Val(no1) * Val(no2)
ElseIf operator = "/" Then
Text1.Text = Val(no1) / Val(no2)
End If
Text1.Text = Text1.Text * 100
End Sub

Private Sub Command7_Click()
Text1.Text = Sqr(Val(Text1.Text))
End Sub

Private Sub Command8_Click()
Text1.Text = vbNullString
no1 = no2 = 0
End Sub

Private Sub Command9_Click()
Text1.Text = vbNullString
End Sub

Private Sub Form_Load()

End Sub