Suppose I want to design my own text editor . simply like notepad. Without using any richtextbox or other controls LIKE EDIT in C++. Main Handle is just a window in C++ or usercontrol in C#. The Question is here for scrolling option , how can I perform scrolling when user is typing. I mean vertical scrolling here . What is Philosophy of works of scroll bars in C++ windows or C# user controls ?
Should I Clear the (Usercontrol or Window) When User reaches to end of (Usercontrol or Window) and then Put caret on start of (Usercontrol or Window) ? What about scrolling with thumb or hand scrolling ? How can I find the Text Position which scroll to ?
What is Philosophy of works of scroll bars ...
In short: Do what is least surprising. In your case this means copy whatever scrolling behaviour your users are already familiar with.
来源：https://stackoverflow.com/questions/5000591/philosophy-of-scroll-bars