Retornando o tipo de variável

Function GetVariantType(const v: variant): string;
begin
case TVarData(v).vType of
varEmpty: result := 'Empty';
varNull: result := 'Null';
varSmallInt: result := 'SmallInt';
varInteger: result := 'Integer';
varSingle: result := 'Single';
varDouble: result := 'Double';
varCurrency: result := 'Currency';
varDate: result := 'Date';
varOleStr: result := 'OleStr';
varDispatch: result := 'Dispatch';
varError: result := 'Error';
varBoolean: result := 'Boolean';
varVariant: result := 'Variant';
varUnknown: result := 'Unknown';
varByte: result := 'Byte';
varString: result := 'String';
varTypeMask: result := 'TypeMask';
varArray: result := 'Array';
varByRef: result := 'ByRef';
end;
end;