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**MARK(**//flag//**)**

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| **MARK** | Enables multiple items selection. |
| //flag// | The label of a QUEUE field. |

The **MARK** attribute (PROP:MARK, Write Queue Field; Read returns True/False) enables multiple item selections from a LIST or COMBO control. When an item in the LIST is selected, the appropriate //flag// field is set to true (1). Each marked entry is automatically highlighted in the LIST or COMBO. Changing the value of the //flag// field also changes the screen display for the related LIST or COMBO entry.

If the MARK attribute is specified on the LIST or COMBO, the IMM attribute may not be.

MARK can be used with a [[prop_vlbproc.htm|VLB List]] if a FROM(Queue) and MARK(Q.MarkFlag) are specified. The List data comes from the VLB but the marking updates the Q.MarkFlag.

**Example:**

  Que1    QUEUE
  MarkFlag BYTE
  F1       LONG
  F2       STRING(8)
          END
  WinOne WINDOW,AT(0,0,160,400),SYSTEM
            LIST,AT(120,0,20,20),USE(?L1),FROM(Que1.F1),MARK(Que1.MarkFlag)
            COMBO(@S8),AT(120,120,,),USE(?C1),FROM(Que1.F2),MARK(Que1.MarkFlag)
           END
   CODE
     DO LoadQue                   !Load Que1 with data
     OPEN(WinOne)
     ACCEPT
     CASE EVENT()
      OF EVENT:CloseWindow
       BREAK
      END
     END
     LOOP X# = 1 to RECORDS(Que1) !Loop through queue entries
      GET(Que1,X#)
      IF Que1.MarkFlag            !If the user marked the entry
       DO ProcessMarked           ! then process it
      END
     END
    !*******Use of PROP:MARK
    ?List{Prop:Mark} = ''         ! clears marking
    ?List{Prop:Mark} = SFQ:Mark   ! set the field
    IF ?List{Prop:Mark} = True THEN  ! Read PROP:Mark  
       Message('LIST has Marking')  
    END