[RESOLVED] GdiPlus - Is possible to change scale?

[jcis]

I changed my picturebox scale to be like in maths (X,Y) with 0 in the exact center, so left half of the pbox has negative x, on the right part x is positive, it's the same for Y values: top half is positive and down half is negative, the code to make this scale is:

    With Me.Picture1
        .ScaleWidth = 50
        .ScaleHeight = -50
        .ScaleLeft = -.ScaleWidth \ 2
        .ScaleTop = Abs(.ScaleHeight \ 2)
    End With

I can draw formulas in the PictueBox using Line method, everything is working fine, but now I want to apply antialiasing so changed to GdiPlus. Using (and twiking a bit) the example i found here i can draw lines using GDI, the problem is it won't respect the PictureBox's scale, i think by default it has cero on the top/left corner and also the unit is much smaller than mine, so: It there any "direct way" to tell GDI what's the scale and place cero in the center for X and Y?
If there is no way to do it then i'll make the conversion myself but maybe GDI allows to set a scale like this.

Thanks.