Explorer freezes when dragging folder until VB event is finished

I'm making a program in VB.NET, which does some file processing on a folder that is dragged into the form control. When the folder is dropped, all I really need is the path to it, and then explorer can go about its day. But the event that the drop calls (Me.DragDrop) freezes the explorer instance that the folder was dragged from until my work is done. Here's what I've got:

Public Sub FileEnter(sender As Object, e As DragEventArgs) Handles Me.DragEnter      If e.Data.GetDataPresent(DataFormats.FileDrop) Then e.Effect = DragDropEffects.Copy  End Sub    Public Sub FileDrop(sender As Object, e As DragEventArgs) Handles Me.DragDrop      dropPath = CType(e.Data.GetData(DataFormats.FileDrop), String()).First      Dim files = Directory.GetFiles(dropPath, "*", SearchOption.AllDirectories)      . . .  End Sub  

once I have dropPath, I don't need the drop event anymore, but it holds on.

https://stackoverflow.com/questions/65894568/explorer-freezes-when-dragging-folder-until-vb-event-is-finished January 26, 2021 at 09:08AM