The DevExpress.XtraRichEdit.RichEditControl.PasteSpecialFormShowing event occurs before the Paste Special dialog is invoked. The PasteSpecialFormShowingEventArgs class introduces the ControllerParameters property, that specifies the information to be displayed in the dialog.
Note, that PasteSpecialFormShowingEventArgs objects are automatically created, initialized and passed to the DevExpress.XtraRichEdit.RichEditControl.PasteSpecialFormShowing event handlers.
System.Object
System.EventArgs
ShowFormEventArgs
FormShowingEventArgs
PasteSpecialFormShowingEventArgs