 Public Class Form1

    Private Sub btn_Sphere_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Sphere.Click
        Dim Radius, Volume As Double
        Radius = Val(TextBox1.Text)
        Volume = Math.Round(4 / 3 * 3.1416 * (Radius ^ 3), 3)
        lblResult.Show()
        lblResult.Text = "Volume = (4/3*3.1416*(Radius ^ 3) :>> " & Volume
    End Sub
    Private Sub btn_Cone_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Cone.Click
        Dim Radius, Height, Volume As Double
        Radius = Val(TextBox1.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(1 / 3 * 3.1416 * (Radius ^ 2) * Height, 3)
        lblResult.Show()
        lblResult.Text = "Volume = (1/3*3.1416*(Radius ^ 2)*Height:>> " & Volume

    End Sub
    Private Sub btn_Cube_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Cube.Click
        Dim Side, Volume As Double
        Side = Val(TextBox1.Text)
        Volume = Math.Round(Side ^ 3, 3)
        lblResult.Show()
        lblResult.Text = "Volume = Side^3:>> " & Volume
    End Sub
    Private Sub btn_Cylinder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Cylinder.Click
        Dim Radius, Height, Volume As Double
        Radius = Val(TextBox1.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(3.1416 * (Radius ^ 2) * Height, 3)
        lblResult.Show()
        lblResult.Text = "Volume = 3.1416*(Radius^2)*Height:>> " & Volume
    End Sub
    Private Sub btn_Tank_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Tank.Click
        Dim Length, Width, Height, Volume As Double
        Length = Val(TextBox1.Text)
        Width = Val(TextBox2.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(Length * Width * Height, 3)
        lblResult.Show()
        lblResult.Text = "Volume = Length*Width*Height:>> " & Volume
    End Sub
    Private Sub btn_Pyramid_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Pyramid.Click
        Dim Side, Height, Volume As Double
        Side = Val(TextBox2.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(1 / 3 * (Side ^ 2) * Height, 3)
        lblResult.Show()
        lblResult.Text = "Volume = 1/3*(Side^2)*Height:>> " & Volume

    End Sub
    Private Sub btn_Cap_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Cap.Click

        Dim Radius, Height As Double
        Radius = Val(TextBox1.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(1 / 3 * 3.1416 * (Radius ^ 3) + 3.1416 * (Radius ^ 2) * Height, 3)
        lblResult.Show()
        lblResult.Text = "Volume = 1/3*pi*(Radius^3)+pi*(Radius^2)*Height:>> " & Volume

    End Sub
    Private Sub btn_Frustum_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Frustum.Click
        Dim Radius_1, Radius_2, Height As Double
        Radius_1 = Val(TextBox1.Text)
        Radius_2 = Val(TextBox2.Text)
        Height = Val(TextBox3.Text)
        Volume = Math.Round(1 / 3 * 3.1416 * Height * ((Radius_1 ^ 2) + (Radius_1 ^ Radius_2) + (Radius_2 ^ 2)), 3)
        lblResult.Show()
        lblResult.Text = "Volume = 1/3*pi*Height*((Rad1^2)+(Rad1*Rad2)+(Rad2^2)):>> " & Volume
    End Sub
    Private Sub lblFrustum_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblFrustum.Click
        TextBox1.Show()
        TextBox2.Show()
        TextBox3.Show()
        lblRad_1.Show()
        lblRad_2.Show()
        lblHeight.Show()
        btn_Frustum.Show()

        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()

    End Sub
    Private Sub lblCone_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblCone.Click
        TextBox1.Show()
        TextBox3.Show()
        lblRad_1.Show()
        lblHeight.Show()
        btn_Cone.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub
    Private Sub lblCylinder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblCylinder.Click
        TextBox3.Show()
        TextBox1.Show()
        lblRad_1.Show()
        lblHeight.Show()
        btn_Cylinder.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub
    Private Sub lblCube_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblCube.Click
        TextBox1.Show()
        lblSide.Show()
        btn_Cube.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub
    Private Sub lblTank_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblTank.Click
        lblLength.Show()
        lblWidth.Show()
        lblHeight.Show()
        btn_Tank.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub
    Private Sub lblPyramid_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblPyramid.Click
        TextBox3.Show()
        TextBox2.Show()
        lblHeight.Show()
        lblWidth.Show()
        btn_Pyramid.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub
    Private Sub lblCap_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblCap.Click
        TextBox3.Show()
        TextBox1.Show()
        lblRad_1.Show()
        lblHeight.Show()
        btn_Cap.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()

    End Sub
    Private Sub lblSphere_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblSphere.Click
        TextBox1.Show()
        lblRad_1.Show()
        btn_Sphere.Show()


        lblSphere.Hide()
        lblCone.Hide()
        lblCube.Hide()
        lblCylinder.Hide()
        lblTank.Hide()
        lblPyramid.Hide()
        lblCap.Hide()
        lblFrustum.Hide()
    End Sub

    Private Sub btnReset_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnReset.Click
        TextBox1.Text = ""
        TextBox2.Text = ""
        TextBox3.Text = ""
        TextBox1.Hide()
        TextBox2.Hide()
        TextBox3.Hide()
        lblRad_1.Hide()
        lblRad_2.Hide()
        lblSide.Hide()
        lblLength.Hide()
        lblWidth.Hide()
        lblHeight.Hide()
        btn_Sphere.Hide()
        btn_Cone.Hide()
        btn_Cube.Hide()
        btn_Cylinder.Hide()
        btn_Tank.Hide()
        btn_Pyramid.Hide()
        btn_Cap.Hide()
        btn_Frustum.Hide()
        lblResult.Hide()


        lblSphere.Show()
        lblCone.Show()
        lblCube.Show()
        lblCylinder.Show()
        lblTank.Show()
        lblPyramid.Show()
        lblCap.Show()
        lblFrustum.Show()
    End Sub
End Class
Public Module Program
	Public Sub Main(args() As string)
 		Console.WriteLine("Hello, World!")
	End Sub
End Module

created 3 years ago by Shi Bi

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About VB.net

Visual Basic is a event driven programming language by Microsoft, first released in the year 1991.

Key Features

Beginner's friendly language.
Simple and object oriented programming language.
User friendly language and easy to develop GUI based applications.

Syntax help

Variables

Variable is a name given to the storage area in order to identify them in our programs.

Simple syntax of Variable declaration is as follows

Dim variableName [ As [ New ] dataType ] [ = initializer ]

Variable initialization

variableName = value

Conditional Statements

1. If

If condition-expression Then 
    'code
End If

2. If-else

If(conditional-expression)Then
   'code if the conditional-expression is true 
Else
  'code if the conditional-expression is false 
End If

3. If-else-if ladder

If(conditional-expression)Then
   'code if the above conditional-expression is true 
Else If(conditional-expression) Then
        'code if the above conditional-expression is true 
    Else
        'code if the above conditional-expression is false 
End If

4. Nested-If

If(conditional-expression)Then
   'code if the above conditional-expression is true
   If(conditional-expression)Then
         'code if the above conditional-expression is true 
   End If
End If

5. Select Case

Select [ Case ] expression
   [ Case expressionlist
      'code ]
   [ Case Else
      'code ]
End Select

Loops

1. For..Next

For counter [ As datatype ] = begin To end [ Step step ]
   'code
   [ Continue For ]
   'code
   [ Exit For ]
   'code
Next [ counter ]

2. For..Each

For Each element [ As datatype ] In group
   'code
   [ Continue For ]
   'code
   [ Exit For ]
   'code
Next [ element ]

3. While

While conditional-expression
   'Code 
   [ Continue While ]
   'Code
   [ Exit While ]
   'Code
End While

4. Do-while

Do { While | Until } conditional-expression
   'Code
   [ Continue Do ]
   'Code
   [ Exit Do ]
   'Code
Loop

Do
   'Code
   [ Continue Do ]
   'Code
   [ Exit Do ]
   'Code
Loop { While | Until } conditional-expression

Procedures

Procedure is a sub-routine which contains set of statements. Usually Procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

Procedures are of two types.

1. Functions

Functions return a value when they are called.

[accessModifiers] Function functionName [(parameterList)] As returnType
   'code
End Function

2. Sub-Procedures

Sub-procedures are similar to functions but they don't return any value.

Sub ProcedureName (parameterList)
'Code
End Sub