Evaluate Delphi Statement

I'm new to Deplhi can anyone tell me what is meaning of code place below and what does it return:

SetRangeStart;
FieldByName('TYPE').AsString := 'SIZE';
FieldByName('NAME').AsString := '';
SetRangeEnd;
FieldByName('TYPE').AsString := 'SIZE';
FieldByName('NAME').AsString := '~';
ApplyRange;

Basially what is the '~' meaning here in the Code.Please any one can help.

Thanks.

Without seeing the rest of the procedure, it's pretty ambiguous code. The ~, however, is merely the ~ character - it's being assigned as the name of the object. In VB it would look like

Object.Name = "~"

I need to know what search criteria this code is building. Suppose we replace '~' with some other character, then of what range this code will pick the records.

Thanks.