Display the visible property of the user control using the property MasterPage.
In MasterPage:
public bool MyBannerVisibility
{
get { return uc_banner1.Visible; }
set { uc_banner1.Visible = value; }
}
Then be sure to add a link to your content page:
<%@ MasterType TypeName="YourMasterPageTypeName" %>
Then, on your content page, simply do:
Master.MyBannerVisibility = false;
Edit: Since you are using VB.net, I used a code converter to convert it:
Public Property MyBannerVisibility() As String
Get
Return uc_banner1.Visible
End Get
Set
uc_banner1.Visible = value
End Set
End Property
Content Page:
Master.MyBannerVisibility = False