>> How i moving and interacting with 2 or more windows in the same
>> For example, one login windows when the login is ok, move to Main windows.
There is only ever one "main window" in an application at any given
time. If you close this (note, Close, not Hide), the application context
returns back to the main program.
I suspect you can call Application.Run twice, once for the login form
and one for your real main form, but you'd have to store the login data
somewhere in the meantime. I haven't tested this, but it would be easy
Lasse Vsher Karlsen