The way to access control in sub-page witin masterpage

The way to access control in sub-page witin masterpage

 

The way to access control in sub-page witin masterpage:

example 1:

DropDownList ddl = (DropDownList)this.Page.Master.FindControl("ContentPlaceHolder1").FindControl(MyStatus.MyDdl);
example 2:

TakebackSection tbs = (TakebackSection)  ((AccountDetails)Page).Master.FindControl("ContentPlaceHolder1").FindControl("TakebackSection1");
here,the situation is, in a user control, we try to access another user control named "TakebackSection1", the name of sub-page is "AccountDetails"