Tells the receiver that the sending web view will perform the specified drag-source action.
Original signature is '- (void)webView:(WebView *)sender willPerformDragSourceAction:(WebDragSourceAction)action fromPoint:(NSPoint)point withPasteboard:(NSPasteboard *)pasteboard'
Available in Mac OS X v10.3.9 and later.

C# | Visual Basic | Visual C++ |
void WebViewWillPerformDragSourceActionFromPointWithPasteboard( WebView sender, WebDragSourceAction action, NSPoint point, NSPasteboard pasteboard )
Sub WebViewWillPerformDragSourceActionFromPointWithPasteboard ( _ sender As WebView, _ action As WebDragSourceAction, _ point As NSPoint, _ pasteboard As NSPasteboard _ )
void WebViewWillPerformDragSourceActionFromPointWithPasteboard( WebView^ sender, WebDragSourceAction action, NSPoint point, NSPasteboard^ pasteboard )

- sender (WebView)
- The web view that sent the message.
- action (WebDragSourceAction)
- The drag-source action to perform. See “Drag-Source Actions” for a list of actions.
- point (NSPoint)
- The point at which the drag began, specified in the coordinates of the web view.
- pasteboard (NSPasteboard)
- The drag pasteboard.

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