Function DbSetScope() Foundation
Sets scope values for logical or physical orders.
Syntax
DbSetScope( <nScope>, <xValue> ) --> NIL
Parameters
<nScope>
A #define constant listed in STD.CH must be used for <nScope>.
Constants for scopes
| Constant | Description |
|---|---|
| SCOPE_BOTH | Specifies top and bottom scope. |
| SCOPE_BOTTOM | Specifies the bottom scope |
| SCOPE_TOP | Specifies the top scope |
<xValue>
This parameter defines the value for the scope specified with <nScope>. When SCOPE_BOTH is passed for <nScope>, <xValue> is used for the top and bottom scope.
<xValue> must have the same data type as the index key or must be a numeric specifying a record number when no controlling index is active.
Return
The return value of DbSetScope() is always NIL.
Description
A scope is used to quickly specify a range of records in a database. Only those records whose scope values lie within the range of the top and bottom scope values are visible. Refer to SET SCOPE for a detailed explanation about scopes.
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