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set select_Mode to multi_select
Procedure SET Select_State integer iItem integer iState
 // Checkboxen sind unveränderbar
End_Procedure
Procedure DoAddItem string sValue
    integer iItem
    get Item_Count to iItem
    Send Add_Item MSG_NONE sValue
    Set Entry_State item iItem to FALSE
End_Procedure
Procedure DoAddRow
    Send DoAddItem ABRDET.NABR_MONAT
    Send DoAddItem ABRDET.NANZ
    Send DoAddItem ABRDET.AGEMEINDE
    Send DoAddItem "" // <-Checkbox Spalte
    Set Checkbox_Item_State item (Item_Count(Self)-1) to TRUE
    // Hier Forward SET Benutzen, da die Proc deaktiviert wurde !
    Forward set Select_State (Item_Count(Self)-1) to (ABRDET.CDIFF_QST=1)
End_Procedure