Take a look at Custom Serialization - MSDN[^] to see if it is of any help. From the page. By controlling serialization, it is possible to ensure serialization compatibility, which is the ability to serialize and deserialize between versions of a type without breaking the core functionality of the type. Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.”

JPG doesn't have alpha layers In C++, if you are willing to assume you would be drawing the PNG image on a black background, look up AlphaBlend. You could draw the PNG to a bitmap or just create a 24 bit image using the raw bytes. The BLENDFUNCTION documentation has a chart of the multipliers you need to use. It looks confusing, but is rather straightforward once you think about it. I'm not sure the equivalent of AlphaBlend in C# (outside of the DirectX classes.) Again, if you assume the background, you could do it yourself. http://msdn.microsoft.com/en-us/library/aa452889.aspx[^]

try to change the value of this e.Graphics.PageUnit = ? I know nothing , I know nothing ...

The Graphics context dictates the way the Fonts are rendered. It is not possible to accurately measure a string without knowing where it is going. All other option require guessing in the method. If you want to guess you can look-up the font characteristics and roll your own, or as suggested earlier create a fake graphics context that does not match the device. Unfortunately, it will be buggy in some edge cases that may be hard to detect in development but the client will notice immediately. The best thing to do is to pass a reference to the Graphics context everywhere you want to draw to a device. Need custom software developed? I do C# development and consulting all over the United States. A man said to the universe: "Sir I exist!" "However," replied the universe, "The fact has not created in me A sense of obligation." --Stephen Crane

Yes, you would use LockBits to get access to the pixel data. No, there isn't any image format with alpha channel and the compression ratio of JPEG, at least not supported by the .NET framework. Despite everything, the person most likely to be fooling you next is yourself.