Error with ActiveX

Hi

I'm using the MapWinGis ActiveX without problem behalve for the fonction DrawPolygon(xPoints, yPoints, numPoints, Color, fill).

All the examples given on http://www.mapwindow.org/  are in Visual Basic.

Dim myArrayX, myArrayY as Double
 
myArrayX(0) = 10
myArrayX(1) = 20
myArrayX(2) = 30
myArrayY(0) = 40
myArrayY(1) = 50
myArrayY(2) = 60
 
Dim conArrayX, conarrayY as Object
 
conArrayX = CObj(myArrayX)
conArrayY = CObj(myArrayY)
 
DrawPolygon(conArrayX, conArrayY, 3, myColor, True)
 
Translated in Delphi, then compilation is completed without error but execution fails at the delivery of the points parameters that must be «Arrays of double» for x and y.
Those parameters must be declared as  TOleVariant in the calling procedure.

My Code:
procedure TGisForm.Button5Click(Sender: TObject);
Var
 x, y : OleVariant;
 xCenter, yCenter : Double;
 TmpDraw, i : Integer;
begin
  x := VarArrayCreate([0,36], varDouble);
  y := VarArrayCreate([0,36], varDouble);
  xCenter := StrToFloat(LabelX1.Caption);
  yCenter := StrToFloat(LabelY1.Caption);
 
  For i := 0 To 36 do
  begin
    x[i] := xCenter + 100 * Sin(pi/180*i * 10);
    y[i] := yCenter + 100 * Cos(pi/180*i * 10);
  end;
 
  TmpDraw := Map1.NewDrawing(dlSpatiallyReferencedList);
  Map1.DrawPolygon(x,y,37,clGreen,False);
end;

genarates "An acces violation error at adress 1002C860 in the module MapWin~1.OCX".

if I remove the statements "VarArrayCreate", the error becomes "The variant is not an array".

Any idea ?