Cannot pop-up dialog box from PS rendering -plugin under splwow64.exe context

Question

Hi,

   I am trying to pop-up a dialog box using DialogBoxParam from my PostScript rendering-plugin dll but it never shows up under splwow64 context i.e. when you are trying to print from a 32-bit app on a 64-bit system. Even simple MessageBox() fails. Native apps or apps that are architecture compatible work fine and shows up the dialog box. Any help is much appreciated.

Thanks,

-V