c# - Problems with the Outlook API - Drag and Drop -

i have plugin outlook treeview.

i know when user drags email don't know how identify when user drags folder

after identify object dragged , if it's folder , made ​​the steps of code below currentfolder , passing , publish emails of folder

outlook.application outlookapplication = globals.thisaddin.application; outlook.explorer outlookexplorer = (outlook.explorer)outlookapplication.activeexplorer(); outlook.selection selection = outlookexplorer.selection; outlook.folder folder = (outlook.folder)outlookexplorer.currentfolder; outlook.items items = folder.items; outlook.mailitem mail = null;  (int = 1; <= items.count; i++)  {     if (items[i] outlook.mailitem)     {         mail = (outlook.mailitem)items[i];          // here have mails , plugin works publish 1 or more mails outlook.mailitems     } } 

someone know how can fix problem ?

everyone, found ugly way solve problem , it's need .

in event args exists lot of properties 1 of these properties appears when dragged folder. code.

if (e.data.getdatapresent("uniformresourcelocator")) {     // step it's true folder  } else {     // step it's others items mailitem, contactitem... } 

someday it's util someone.

regards !!!