Storing data consistantly between forms

Hi everyone,

I have such a scenario in my VB system development. I'm confident that many of you experts know how to get this done.

Please help. Appreciate any suggestions.
Many thanks in advance.

A user logs into the system through the login form. In a subsequent form, the program should display the user's login name which was first inputted in the login form (upon successful login). How do I display the user's login name in a subsequent form?

In a subsequent form, I have tried the following codes (a, b and c) but during program execution, the user's login name is not displayed (blank) in the a subsequent form.
To my observation, only after a subsequent form has been closed and re-opened (user still has not logged out), then only the user's login name is displayed in that subsequent form.

How do I fix this problem? What are the methods / options available?

a)
lblUserName.Caption = frmLogin.txtUserID.Text

b)
Dim strUN As String
strUN = frmLogin.txtUserID.Text

lblUserName.Caption = strUN

c)
'Start - Code in module
Public g_strUserID As String
'End

'Start - Code in login form
'upon successful login
g_strUserID = txtUserID.Text
'End

'Start - Code in subsequent form
lblUserName.Caption = g_strUserID
'End

Try this:

Form1 (Contains a textbox, txtUserName)(Command Button)
Form2 (Contains a textbox, txtGreet)

This works fine for me:

Thanks. Your post helped me with this problem.

I wrote this in the VB login form (upon successful login) and it managed to solve the problem.

frmSubsequent.lblUserName.Caption = txtUserID.Text

No problem, my pleasure.