onBeforeSendAttachment (event)
Marks the start of sending an attachment.
Syntax
- (void)onBeforeSendAttachment:(int*)lastAttachment;
func onBeforeSendAttachment(_ lastAttachment: inout Int32)
Remarks
Use either AttachmentBytes, AttachmentFile or AttachmentStream properties to pass attachment to the class.
Set LastAttachment parameter to False to indicate that you have more than one attachment to pass.