Is it possible to have a Mathematia Tree View like in C# WIndows Forms ? Also I feel there is needed more GUI elements in Mathematica (Matlab GUI builder is more advanced at the moment :()
Could you give an example so those of us who do not know C# can understand the question.
Also, be specific about what GUI elements you are talking about.
You could certainly build something like this with OpenerView. Here is a small (10 second) example:
OpenerView
OpenerView[{a, Row[{Spacer[10], Column[{b, c}]}]}]
And a more sophisticated treatment could nest multiple OpenerViews.
Thanx , What is the purpose of Row ?
Just a formatting construct to allow me to put the Spacer[10] before the Column so that the Column is indented.
Spacer[10]
Column
