display Bitmap xx() in forms

Hi there

I'm trying to display image on a form with a display bitmap method to feed a window control on a form.

I've seen the example on several blogs and followed them coding thing like this:

display Bitmap picture()

{

    container ret;

    // prepare container data from a bimap image

    return ret;

}

Then I placed a window control on the form and refered the datamethod to 'picture'.

However, every time the method is executed, AX freezes instead of showing the image. It makes no difference if I load the bitmap from a file or from the AOT node nor to return a null value - crashes every time.

Have the problem in AX 4.0, AX 2009 and AX 2012.

What's the trick to run this code?