For an article I wanted to create a VB.Net demo project with Master/Detail GridView and RichTextColumn.
Parts of my demo project are taken from CP articles about Master/Detail GridViews.
But most of them have the issue with the keys not working on the childView - that prevents moving through the child grid with arrow keys.
Same happens with keys page up/down and pos1/end.
Instead of navigating through the childView those keys let you navigate through the Main/Parent Form.
FlexGrid? Why on earth would you be using such an ancient control?
Your question doesn't make sense. What value? Why are you using the KeyPress and KeyDown events? For what? What is the DoubleClick event being used? For what? What are you expecting to work that doesn't?
Oh, and change your username to something other than your email address, unless you like getting bombarded by spam emails. NEVER post your email address in a public forum.