If your talking about a tree like the one shown on this page:
Abstract syntax tree
then there's no standard GUI component available to help you. You're going to have to code something using Win32 directly, or using MFC, Qt, wxWidgets, etc (none of which have a suitable stock component.) Unless you can find some open source code you can "borrow", that is.
Coding something like this in Win32 GDI calls should be pretty simple. You probably just need to use MoveToEx, LineTo, Rectangle, and DrawText. Plus change the colors of the pens. Of course, you can do more if you want it to look prettier.
(DrawText can be asked to tell you how big a rectangle is required for a piece of text. See explantion of th DT_CALCRECT flag in the MSDN entry for DrawText. You can use it tp calculate the sizes of the rectangles, then use that information to calculate their positions, and then draw them.)
PS The only Win32 tree control is the one used for the left hand side of Windows Explorer, etc; which prob isn't what you want.