| **Navigation:**  [[introduction.htm|Language Reference]] > 13 - Built-in Functions >====== DRAGID (return matching drag-and-drop signature) ====== | [[display write use variables to screen .htm|{{btn_prev_n.gif|Previous page}}]][[introduction.htm|{{btn_home_n.gif|Return to chapter overview}}]][[dropid return drag and drop string .htm|{{btn_next_n.gif|Next page}}]] | | || {{newc7.jpg|NewC7.jpg}} **DRAGID(** [//thread//] [, //control//] **)** {{blk2blue.jpg|blk2blue.jpg}} | **DRAGID** | Returns matching host and target signatures on a successful drag-and-drop operation. | | //thread// | The label of a numeric variable to receive the thread number of the host control. If the host control is in an external program, //thread// receives zero (0). | | //control// | The label of a numeric variable to receive the field equate label of the host control. | The **DRAGID** procedure returns the matching host and target control signatures on a successful drag-and-drop operation. If the user aborted the operation, DRAGID returns an empty string (''), otherwise it returns the first signature that matched between the two controls. | **Return Data Type:** | STRING | **Example:** **Que1 QUEUE** **      STRING(30)** **     END** **Que2 QUEUE(Que1)           !Que2 declared same as Que1** **     END** **Que3 QUEUE(Que1)           !Que3 declared same as Que1** **     END** **WinOne WINDOW,AT(0,0,360,400)** **        !Allows drags, but not drops:** **        LIST,AT(120,0,20,20),USE(?List1),FROM(Que1),DRAGID('List1')** **        !Allows drops from List1 or List3, but no drags:** **        LIST,AT(120,120,20,20),USE(?List2),FROM(Que2),DROPID('List1','List3')** **        !Allows drags, but not drops:** **        LIST,AT(120,240,20,20),USE(?List3),FROM(Que3),DRAGID('List3')** **       END** ** CODE** ** OPEN(WinOne)** ** ACCEPT** **  CASE EVENT()** **   OF EVENT:Drop           !When drop event is successful** **    CASE ****DRAGID****()          !check for which host dropped it** **     OF 'List1'** **      Que2 = Que1          !get dropped info from Que1** **     OF 'List3'** **      Que2 = Que3          !get dropped info from Que3** **    END** **   ADD(Que2)               !add either one to the drop queue** **  END** ** END** **See Also:** [[dropid return drag and drop string .htm|DROPID]] [[setdropid set dropid return string .htm|SETDROPID]]