Variable Declaration
Dim BlnVal As Boolean

Private Sub UserForm_Initialize()
    'Variable declaration
    Dim IdVal As Integer
    
    'Finding last row in the Data Sheet
    IdVal = fn_LastRow(Sheets("Data"))
    
    'Update next available id on the userform
    frmData.txtId = IdVal
End Sub
Sub cmdAdd_Click()
    On Error GoTo ErrOccured
    'Boolean Value
    BlnVal = 0
    
    'Data Validation
    Call Data_Validation
    
    'Check validation of all fields are completed are not
    If BlnVal = 0 Then Exit Sub
      
    'TurnOff screen updating
    With Application
        .ScreenUpdating = False
        .EnableEvents = False
    End With
     
    'Variable declaration
    Dim txtId, txtName, GenderValue, txtLocation, txtCNum, txtEAddr, txtRemarks
    Dim iCnt As Integer
    
    'find next available row to update data in the data worksheet
    iCnt = fn_LastRow(Sheets("Data")) + 1
    
    'Find Gender value
    If frmData.obMale = True Then
       GenderValue = "Male"
    Else
       GenderValue = "Female"
    End If
    
    'Update userform data to the Data Worksheet
    With Sheets("Data")
        .Cells(iCnt, 1) = iCnt - 1
        .Cells(iCnt, 2) = frmData.txtName
        .Cells(iCnt, 3) = GenderValue
        .Cells(iCnt, 4) = frmData.txtLocation.Value
        .Cells(iCnt, 5) = frmData.txtEAddr
        .Cells(iCnt, 6) = frmData.txtCNum
        .Cells(iCnt, 7) = frmData.txtRemarks
      
        
        'Diplay headers on the first row of Data Worksheet
        If .Range("A1") = "" Then
            .Cells(1, 1) = "Id"
            .Cells(1, 2) = "Name"
            .Cells(1, 3) = "Gender"
            .Cells(1, 4) = "Location"
            .Cells(1, 5) = "Email Addres"
            .Cells(1, 6) = "Contact Number"
            .Cells(1, 7) = "Remarks"
            
            'Formatiing Data
            .Columns("A:G").Columns.AutoFit
            .Range("A1:G1").Font.Bold = True
            .Range("A1:G1").LineStyle = xlDash
            
        End If
    End With
‘Display next available Id number on the Userform
'Variable declaration
    Dim IdVal As Integer
    
    'Finding last row in the Data Sheet
    IdVal = fn_LastRow(Sheets("Data"))
    
    'Update next available id on the userform
    frmData.txtId = IdVal
ErrOccured:
    'TurnOn screen updating
    Application.ScreenUpdating = True
    Application .EnableEvents = True
    
End Sub

'In this example we are finding the last Row of specified Sheet
Function fn_LastRow(ByVal Sht As Worksheet)

    Dim lastRow As Long
    lastRow = Sht.Cells.SpecialCells(xlLastCell).Row
    lRow = Sht.Cells.SpecialCells(xlLastCell).Row
    Do While Application.CountA(Sht.Rows(lRow)) = 0 And lRow <> 1
        lRow = lRow - 1
    Loop
    fn_LastRow = lRow

End Function

'Exit from the Userform
Private Sub cmdCancel_Click()
    Unload Me
End Sub

' Check all the data(except remarks field) has entered are not on the userform
Sub Data_Validation()
     If txtName = "" Then
        MsgBox "Enter Name!", vbInformation, "Name"
        Exit Sub
     ElseIf frmData.obMale = False And frmData.obFMale = False Then
        MsgBox "Select Gender!", vbInformation, "Gender"
        Exit Sub
     ElseIf txtLocation = "" Then
        MsgBox "Enter Location!", vbInformation, "Location"
        Exit Sub
    ElseIf txtEAddr = "" Then
        MsgBox "Enter Address!", vbInformation, "Email Address"
        Exit Sub
    ElseIf txtCNum = "" Then
        MsgBox "Enter Contact Number!", vbInformation, "Contact Number"
        Exit Sub
    Else
        BlnVal = 1
    End If
End Sub

'Clearing data fields of userform
Private Sub cmdClear_Click()
    Application.ScreenUpdating = False
        txtId.Text = ""
        txtName.Text = ""
        obMale.Value = True
        txtLocation = ""
        txtEAddr = ""
        txtCNum = ""
        txtRemarks = ""
    Application.ScreenUpdating = True
End Sub 

Visual basic (VB.net) Online Compiler

Write, Run & Share VB.net code online using OneCompiler's VB.net online compiler for free. It's one of the robust, feature-rich online compilers for VB.net language, running on the latest version 16. Getting started with the OneCompiler's VB.net compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as VB.net. OneCompiler also has reference programs, where you can look for the sample code to get started with.

Read input from STDIN in VB.net

OneCompiler's VB.net online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample VB.net program which takes name as input and prints hello message with your name.

Public Module Program
	Public Sub Main(args() As string)
	 Dim name as String = Console.ReadLine()    ' Reading input from STDIN
   Console.WriteLine("Hello " & name)           ' Writing output to STDOUT
	End Sub
End Module

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