RAD Studio VCL Reference
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Checks if a field name already exists in the TFields object.
procedure CheckFieldName(const FieldName: WideString);
__fastcall CheckFieldName(const BSTR FieldName);
CheckFieldName checks for the field specified by FieldName in the Fields property array. If the field with the specified name is already listed, CheckFieldName raises an EDatabaseError exception with a duplicate field name error message.
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