I am working on a win32 application. In this application I want to display postscript data on the window DC.
Please, can anyone suggest how to do so?
PostScript is an interpreted programming language, so you can't 'display PostScript data'. You need to execute the program by using a PostScript interpreter.
Which PostScript interpreter you use is up to you, it will depend on whether you are prepared to pay for a commercial interpreter, or can abide by the GPL open source licence.
If you are happy to use GPL software, then I suggest Ghostscript, the simple application for Windows even uses win32 API calls to do pretty much what I think you want, so you can use it as a working example.