[delphi-en] TriState TreeView

[fajar_anggiawan]

Anyone know TreeView component with tristate checkbox? Right now I have made 
treeview with checkbox but it only have checked state and unchecked stated. I 
use this to add checkbox :

SetWindowLong(TreeView1.Handle, GWL_STYLE, GetWindowLong(TreeView1.Handle,
      GWL_STYLE) or TVS_CHECKBOXES);

I never see tristate checkbox source code like this in Delphi.. :(

Thanks