YYProject.RichTextBoxEx
Provides a more comprehensive RichTextBox of the WinForm.
Features
- Vertical writing： Gets or sets a value indicating whether text in the text box is written vertically.
- Line spacing： Gets or sets the line spacing of the current text selection or insertion point.
- SelectionParaSpacing property： Gets or sets the paragraph spacing of the current text selection or insertion point.
- ReadOnly property： Additional options added
- GetFirstVisibleLineIndex method: Returns the line index for the first line that is currently visible in the RichTextBoxEx. YYProject.RichTextBoxEx: VS 2017, .NET 4.5.2, C# 7.2
Demo: VS 2017, .NET 4.5.2, C# 7.0
All public and propected members have detailed annotation, so this doc is brief P:)