Gets value of attribute. This method works only with attributes, whose values are double.

Sub AttributesDoubleGet( _
   ByVal _bsName As String, _
   ByRef _pdblValue As Double _
) 

void AttributesDoubleGet( 
   string _bsName,
   out double _pdblValue
)

procedure AttributesDoubleGet( 
    _bsName: String;
   Out  _pdblValue: Double
); 

void AttributesDoubleGet( 
   BSTR* _bsName,
   [PARAMFLAG::Out] double _pdblValue
) 

Dim myValue As Double
m_pAttributes.AttributesDoubleGet("x", myValue)

double myValue;
m_pAttributes.AttributesDoubleGet("x", out myValue);

var
myValue: double;
begin
m_pAttributes.AttributesDoubleGet('x', myValue);
end;