In Win32 application how to display image data that be stored in memory

If you are using a png image, Win32 does not offer a way to load that into memory. You have to use an external library, like LIBPNG[^] to load the image and convert it to a bitmap. Once you have a bitmap in memory, a simple BitBlt will get you there.

As an alternative, you might consider GDI+ as the previous post recommended. That requires for some Windows versions the instalation of the GDI+ DLL.

There is another way that you can try .
The api CreateFile can read an existing file to the memory .So , if you know more about the foamat of png and bitmap , you can do the transform by yourself .In this case ,just like you implements the function that include in the GDI+ DLLs .This is a difficult way ,but you can learn more about the picture format and you will use it effective. By the way ,windows just provide the Bitmap struct ,and not provide the struct of png . So ,you must define your png's struct by yourself .Good luck!!!