Dim i as integer=10
dim j as integer=20

In the above two statements, y the error is coming...How can we initilase the values to the variables???

hey tell me one more thing,Its necessary to declare dim i as integer within any procedure ex, Form_Load,Button_Click. We cannot declare it outside the procedure.

Like
Dim x As Integer
x = 10

Dim y As Integer
y = 10

Private Sub Command1_Click()
Print x + y
End Sub

you can declare x and j in outside procedure or event but the assignment must be in procedure or event.
ex :

you can also use a variable without declaring the same. but for this you must turn off "Required Variable Declaration" option.

it is always recommended that you use variables after explicitly declaring them. this will help boosting up your program process by preventing memory wastage.

one more thing, you can declare a variable in anywhere inside your code. depending on the declaration section the variable's scope will be determined. if you use it in outside procedure or in general declaration it will treated as a shared or global variable and can be accessed from any procedure present in the same module. now if you declare a variable inside any procedure its scope will be limited to that procedure only where you have declared it. In order to initialize a variable you must follow the way Jx_Man said. and one more thing, the syntax you have used here is applicable in VB.Net not in VB6.

now for example,
declare a variable in form's general declaration section

Dim i as Integer

now the above var. can be accessed from any procedure like,

Private Sub Command1_Click()
i=10
Msgbox i
End Sub

Private Sub Command2_Click()
i=i+val(trim(Text1.text))
Msgbox i
End Sub

now declare another var. c inside a procedure like,

Private Function Sum(a as Integer,b as Integer)
Dim c as Integer

c=a+b
Sum=c
End Sub

now call this from an event like,

Private Sub Command3_Click()
Dim result as Integer

result=Sum(10,20)
Msgbox result

c=100 ''error
Msgbox c ''error
End Sub

now the last two lines inside the above procedure will give an error like "Variable not defined". this is because you have declared the var. C inside the function Sum, so it cannot be accessible from Command3_Click() event. to use it from Command3_Click() event you must declare it explicitly inside it.

hope this will clear your doubts regarding this issue.

regards
Shouvik

sorry i wrong :

Hey Jx_Man, hey these are small errors even a fresher like me will be able to find it out. No Sorry.
Hey Choudhary See the prog below--
Private Sub Command2_Click()
i = 20
j = 10
Print i - j
End Sub

Private Sub Command3_Click()
Dim i As Integer
Dim j As Integer
i = 10
j = 20
Print i + j
End Sub

No error is coming in the above prog,as u said if u declare the variables inside the procedure they are local to the procedure.

And also no error is coming in ur prog(Last two lines).

Second thing, By Default Option Explicit is off in Vb, & on in VB.Net.
Therefore even if i n not declaring the variables,noo error is coming see below
Private Sub Command3_Click()
i = 10
j = 20
Print i + j
End Sub

Plz check variables defined inside the procedure are local to the procedure or not & REply.


FUNCTIONs--

I want to ask there is no return statement in VB, then how we do the foll. prog-

Private Sub Command1_Click()
Dim sum As Integer
sum = Add(10, 20)
Print sum
End Sub

Private Function sum(a As Integer, b As Integer)
Dim c As Integer
c = a + b
return c
End Function

Private Sub Command1_Click()
Dim a, b As Integer
a = 3
b = 2
total = sum(a, b)
MsgBox (total)
End Sub

Private Function sum(a, b)
sum = a + bEnd Function

Prog. is working,But i have doubt the text, marked as red is not correct

Hi,

A Function Declaration in VB6 is as :


Return is the same as Function Name..("Sum" in above case)

Regards
Veena