PLEASE HELP ME! Form single instance???

Question

Ok,,
I have 2 forms (formClassA and formClassB)
When my main form (formClassA) loads, I want to have "THIS" instance of the form be used / called upon for the rest of my application.
Such that.. .
From formClassB I would like to be able to call on a public method in formClassA at any given time without starting a NEW instance of formClassA. I believe that is what is happening now because when I call on one of these methods I am getting a null reference for formClassA.
in formClassA I have a method like..
public DoSomething()
{
code
}
In formClassB within the formClassB class declaration I have placed the following code.
fca = formClassA
In formClassB I am putting the following code..
fca.DoSomething(...)
..............
I know this is probably not the correct way or I have something missing..
Any assistance woudl be GREATLY appreciated.
Thanks,
Bob

jcity444 · Answer

One thing you can do is construct formClassB by passing the parent form in the constructor of formClassB and assigning it as a reference to a field called _parent (for example)
e.g.
formClassA _parent;
formClassB(formClassA parent)
{
_parent = parent;
}
void DoSomething()
{
_parent.DoSomething();
}
-Mike G