[Image-SIG] Problem printing images via ImageWin

[howard at eegsoftware.com]

I am trying to use the code snippet below to print images (under 
Windows).  The output file (out.png) is correctly saved but nothing ever 
prints.  When I uncomment out the WritePrinter command, the text prints 
so I am *assuming* I opened the printer OK. 

It appears that expose function does not send anything to the printer 
context.   This is PIL.1.1.4 (binary installer).

What AM I doing wrong?
--------

        # grab image
        img=_grabwidget(container.fr)
        img.save("out.png")
        ##translate gray to white
        ##optionally make grayscale
        dib=ImageWin.Dib('RGB',img.size)
        dib.paste(img,None)
        # get DC
        try:
            hnum=win32print.OpenPrinter(pname)
        except:
            if prt:
                print 'failure OpenPrinter'
            return
        try:
            win32print.StartDocPrinter(hnum,1,('Test',None,None))
        except:
            if prt:
                print 'failure startdocprint'
        ##win32print.WritePrinter(hnum,'This is a test\n')
        
        try:
            dc=win32ui.CreateDCFromHandle(hnum)
        except:
            if prt:
                print 'failure getting DC'
            return
        
        # output to DC
        hdc=dc.GetHandleAttrib()
        
        dib.expose(hdc) 
        # close DC
        
        del dc
        win32print.EndDocPrinter(hnum)
        win32print.ClosePrinter(hnum)
        del dib
        del img