Sent when the user attempts to drag a cell.
Original signature is '- (void)textView:(NSTextView *)aTextView draggedCell:(id < NSTextAttachmentCell >)cell inRect:(NSRect)rect event:(NSEvent *)event atIndex:(NSUInteger)charIndex'
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
void TextViewDraggedCellInRectEventAtIndex( NSTextView aTextView, INSTextAttachmentCell cell, NSRect rect, NSEvent event, NSUInteger charIndex )
Sub TextViewDraggedCellInRectEventAtIndex ( _ aTextView As NSTextView, _ cell As INSTextAttachmentCell, _ rect As NSRect, _ event As NSEvent, _ charIndex As NSUInteger _ )
void TextViewDraggedCellInRectEventAtIndex( NSTextView^ aTextView, INSTextAttachmentCell^ cell, NSRect rect, NSEvent^ event, NSUInteger charIndex )

- aTextView (NSTextView)
- The text view sending the message.
- cell (INSTextAttachmentCell)
- The cell being dragged.
- rect (NSRect)
- MISSING
- event (NSEvent)
- MISSING
- charIndex (NSUInteger)
- The character position where the mouse button was clicked.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)