hello,I encountered some problems in my homework.I was working on one small software.It's to draw flowchart . I was asked to save my flowchart in png format,but I don't konw how to do it.the file system of png is to hard for me.I am wondering is there exists any library can help me to solve the problem.We cannot coding in c# or using .net.we can only using c++ or some libraries in c++.I was very worry about it ,because the deadline is coming.Can anyone give me any advice.