What has your experience been with displaying user controls using the 2011 api?

http://help.solidworks.com/2011/english/api/sldworksapi/SolidWorks.Interop.sldworks_releasenotessldworks.html?id=73ee30d65e6f41d591084d8fda93b7e2#Pg0

Display .NET controls in the SolidWorks user interface. See IPropertyManagerPageWindowFromHandle, IModelViewManager::CreateFeatureMgrWindowFromHandle, IModelViewManager::CreateFeatureMgrWindowFromHandlex64, IModelViewManager::DisplayWindowFromHandle, IModelViewManager::DisplayWindowFromHandlex64, ITaskpaneView::DisplayWindowFromHandle, and ITaskpaneView::DisplayWindowFromHandlex64