pixmap and png..background

[AKILA M <akila crlbel ernet in>]

hello,
    i create a pixmap from a png file using the following API

        pixbuf = gdk_pixbuf_new_from_file("filename.png");
        gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 127);
        image = gtk_pixmap_new(pixmap, mask);

        i put the image in an event box and display it in a fixed
container. My problem is that i get a white backgroud in the image. i have
read the previous discussions on this problem(one posted 2 days earlier).
i can't use

        gtk_image_from_new_file (GTK2.0)

since i use gtk1.2.8. i create the png image file using XPaint. i
alternatively use gimp also. but the background is the same white. i have
tried converting png to xpm file. i also found out this(background in
white) doesnot happen with xpm files stored in buffers...and can be used
in API

         pixmap = gdk_pixmap_create_from_xpm_d(fcontainer->window,
                                                &mask,
                                                &style->bg[GTK_STATE_NORMAL],
                                                buffer_xpm);

But i want to know how i can get transparent background in png
files.(using GTK1.2.8)

Any help would be very useful....

i have attached a sample png file with this.."dot_circle.png"

Thankx a lot
akila




******************************************************************************
M. Akila,
Central Research Laboratory,
Bharat Electronics,
Jalahalli,
Bangalore.

Ph.No (off): 91-080-8381125
E-Mail Id  : akila crlbel ernet in
                
                                 HAVE A NICE DAY
******************************************************************************

Attachment: dot_circle.png
Description: GIF image