The Parameters tab is automatically populated with every parameter you referenced in the where clause on the record view or in any of the fields on the Fields tab.
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Parameter – Parameters are always preceded by a colon, but here you will notice it is not included. Any system parameters that you used are flagged as such and do not require further action. But all user defined parameters for the grid must be completed here. So, select that user defined parameter for update and then specify Data Type and possibly the Parent Grid Field.
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Data Type – Identify the selected parameter as a string, a number or a date.
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Parent Grid Field – Only required if the grid is a tab on an existing screen. In that case usually the header key field is a parameter in the where clause. Earlier we gave the example of a tab on the Work Orders screen and used the following: ‘and xxx_event = :WOnbr’. For this parameter WOnbr use the lookup on this field to see all options and pick Work Order (e.evt_code). Note that the options in the lookup differ depending on the Parent Screen selected on the Record View of the Grid Designer screen.