FORM BUILDER开发，遇到这样一个需求：
添加一个CHECKBOX完成全选功能，红框为新添加的CHECKBOX（如图示）
Try to use APP_RECORD.FOR_ALL_RECORDS
ex：Soure Block：TEST Soure Item：CHECK(is a Checkbox Item)
1、BLOCK：CONTROL(Non Database Data Block) Add a Checkbox Item(Item Name：ALL_CHECK)
2、CONTROL.ALL_CHECK add Trigger(Item Level) -- WHEN-CHECKBOXBOX-CHANGED
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BEGIN
APP_RECORD.FOR_ALL_RECORDS ('TEST' --Source Block
,'ALL_CHECK' --Source Block Trigger
);
END;
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3、Block：TEST add User-define Trigger(Block Level), Trigger Name：ALL_CHECK
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BEGIN
IF :CONTROL.ALL_CHECK = 'Y' THEN
:TEST.CHECK = 'Y';
ELSE
:TEST.CHECK = 'N';
END IF;
END;
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