    Ŀ
                  Source                                Target              
    
                                                          
                                                          
                                                 DrgAllocDragtransfer
                                                          
                                                  DrgSendTransferMsg
                                                          
                                  DM_RENDER               
                     
                                                          
(Verify the rendering mechanism and format)                
                                                          
                  DosCopy                                  
                                                          
            DrgFreeDragtransfer                            
                                                          
             DrgSendTransferMsg                            
                                                          
                              DM_RENDERCOMPLETE           
                     
                     
                                                          
                     
                                                          
                                                 DrgFreeDragtransfer
                                                          
                                                  DrgSendTransferMsg
                                                          
                              DM_ENDCONVERSATION          
                     
                     
                                                          
                                                          
                                                          
