For inti As Integer = 0 To ComboBox1.Items.Count - 1
      For intj As Integer = 0 To ComboBox2.Items.Count - 1
          If ComboBox1.Items(inti).ToString =  
ComboBox2.Items(intj).ToString Then
             MessageBox.Show(ComboBox1.Items(inti))
          End If
      Next
  Next

Its very easy. 
1-Take a barcode font like we used Arial, Time new Roman
2-Install this font at window fonts directory
3-Use Steric (*) at both ends of a field of Report with the 
help of double/single commas 
4.Change this field Font Like from Time new roman to 
Barcode font
e.g Bar is field that contain digit from 1 to 8 as shown 
below
  *12345678*
After changing font these digit were converted into Black 
Lines mean barcode
|||||||||||||||

5-Take print of barcode and enjoy.

If you feel any problem then email me at 
salmansahb@hotmail.com and i will furhter send you font or 
report.

insert into <tablename> values (Parm1,parm2....)

<base target="_self"> is the only available fix. You can
delete all the cache & offline files from your browser.

Validate

In List Box we have to choose one of the option from the 
drop down list 
In Combo just like radio button we have to choose any one

ListBox is used to select one item out of diffenrent we 
have.
But
ComboBox is used to enter an item at run time.

in ListBox u can select multiple items.
but in Combo box u can select only one item.

The listbox control is used to display a list of items to a 
user.
Combobox control is used to display a drop- down list of 
items . It is a combination of a text box in which a user 
enter an items,and a drop-downlist from which the user 
selects an item.

In listbox we can select more than one item.
but in case of combobox we dont have that chance,we have to 
select only one item from the list of items.

1) Combo Box:												
a. User should be able to enter text in it.												
b. Pressing the arrow should give list of options available
to the user. List can be scrollable but user should not be
able to type in.												
c. Pressing Ctrl-F4 should open the list box.												
d. Pressing a letter should bring the first item in the list
starting with the same letter.												
e. Items should be in alphabetical
order in any list.												
f. Selected item should be displayed on the list.												
g. There should be only one blank space in the
dropdown list.												
												
2) List Boxes:												
a. Should allow single select, either by mouse or
arrow keys.												
b. Pressing any letter should take you to the first element
starting with that letter												
c. If there are view/open button, double clicking on icon
should be mapped to these behaviour.												
d. Make sure that all the data can be seen using
scroll bar.