Heh...here is how to add checkboxes:
Const TVS_CHECKBOXES =$0100
htree=QueryObject(tree,1)
style=GetWindowLong(htree,GWL_STYLE)
SetWindowLong htree,GWL_STYLE,style+TVS_CHECKBOXES
Const TVS_CHECKBOXES =$0100
htree=QueryObject(tree,1)
style=GetWindowLong(htree,GWL_STYLE)
SetWindowLong htree,GWL_STYLE,style+TVS_CHECKBOXES