Best language is this one, in which you can do the most. Different languages have different purposes, so comparing C/C++ with C#/VB.NET is just stupid.
@OP.
You have started with the simplest thing, which can be good sometimes to just get things going, but probably not in this case. I'd try to overcome the hardest thing first. This way you won't waste your time.
btw. I don't like VB.NET much (not at all to be specific). I just hate its syntax and lack of features that C# has. And VB.NET is not easier than C#. Dunno why people keep saying this.
btw2. You probably use webView control to login. That's not good really. Cosider working on HTTP requests instead, just "proper way to do this".
@OP.
You have started with the simplest thing, which can be good sometimes to just get things going, but probably not in this case. I'd try to overcome the hardest thing first. This way you won't waste your time.
btw. I don't like VB.NET much (not at all to be specific). I just hate its syntax and lack of features that C# has. And VB.NET is not easier than C#. Dunno why people keep saying this.
btw2. You probably use webView control to login. That's not good really. Cosider working on HTTP requests instead, just "proper way to do this".