How can I sync the scrolling of two multiline textboxes?

Question

How can I sync the scrolling of two multiline textboxes in C# (WinForms)?

When you scroll up/down a line in TextBox A, TextBox B should scroll up/down too. The same

Answer 1

You can change this line:

if (m.Msg == 0x115) && !scrolling && Buddy != null && Buddy.IsHandleCreated)

to this:

if ((m.Msg == 0x115 || m.Msg==0x20a) && !scrolling && Buddy != null && Buddy.IsHandleCreated)

and it will support scrolling with the mouse wheel as well.