Visual Basic

Dim myTBList as New ArrayList     ' or some other list...
for i=1 to 10
    Dim txtbox1 As New TextBox
    Me.Controls.Add(txtbox1)
    myTBList.Add(txtbox1)
next

For i As Integer = 1 to 10
    Dim newTB As New TextBox()
    With newTB
        ' Setup your textbox position, size, ...
        ' and any other properties you want.
    End With
    Me.Controls.Add(newTB)
Next

int n=14643;
string s=n.ToString("X4");

Sub Main()
    Dim n As Integer = 14643
    Dim s As String = n.ToString("X4")
    Console.WriteLine(s)
    ' or all in one line:
    Console.WriteLine(14643.ToString("X4"))
    ' Keep console window open:
    Console.ReadLine()
End Sub

14643 is<br />
0011100100110011 in binary 16 bits<br />
00111001 00110011 as two 8 bit values<br />
57 51 in decimal

Dim checksum As Int16 = 14643<br />
Dim bytes As Byte() = BitConverter.GetBytes(checksum)

Dim pic As New PictureBox()
With pic
    . ' setup the picture box
End With
Me.Controls.Add(pic)

MyList1.Add(pic)
MyList2.Add(pic)