Thread: variable problem

i am new in vb i am trying to demonstrates a function that returns a customer data type. but i got the errors

"Warning 1 Variable 'Company' is used before it has been assigned a value. A null reference exception could result at runtime",
Warning 2 Variable 'Address' is used before it has been assigned a value. A null reference exception could result at runtime,
"Warning 3 Variable 'city' is used before it has been assigned a value. A null reference exception could result at runtime.
" Warning 4 Variable 'Country' is used before it has been assigned a value. A null reference exception could result at runtime".

i have tried to solve these but not fix these errors. please tell me how to fix these

Thanks in advance

Generally you should declare the variable when you need it and assign it a value directly, for example instead of this:

Dim b As Button

b = New Button

you do this:

Dim b As Button = New Button

or better yet the short form:

Dim b As New Button

If this is not possible you can explicitly assign a null reference to get rid of the warning:

Dim b As Button = Nothing

If condition Then

    b = new Button

Else ...

By doing this you're telling compiler you're aware that this variable is initially a null reference, and implicitly that you should be taking precautions to avoid causing a null reference exception at runtime later in code.

Try assigning a blank string to each of the variables right at the beginning. Example:
Dim company As String = ""