How can I take a screenshot and save it as JPEG on Windows?

Question

I\'m trying to find a (somewhat) easy way to take a screenshot on window and save the resulting HBITMAP as a JPEG. The tricky part here is that since the code is in C I can\

Answer 1

One possibility: If you can't modify this program to save as Jpeg, write a second program, using C# / GDI+ / other fancy technologies to monitor the save directory and process saved BMPs into jpegs.

If you can't do that, the Independent Jpeg group has made pure-C Jpeg code available since the late 20th century: A very minimal web page is available here.