thanks Albert for the reply.

i use this code below to try to remove all containers on the form ( based on the class ycnt container)

with thisform
For Each obj In .Controls
  If Lower(obj.Class)=="ycnt"
	.RemoveObject(obj.Name)
	DoEvents
  Endi
Next
endwith

i tried also to remove first all objects in each container based ycnt and then remove the container form the from with removeObject(obj.name)....no good result.
there is always some ycnt containers persisting appear on the form.
using the vertical form.scrollbar make the form with garbages also.

see the 2 photo attached.