Comments by _Erik_ (Top 5 by date)

Is this exactly the code your program runs or have you simplified it? I'm asking becouse, for example, calling CreateGraphics on a control which has not still created the handle can cause illegal cross thread calls.

Yes, I have read your question, but I have done this kind of work countless times and so I do know you just have to use double buffer to avoid flickering, so maybe you are not using double buffer in the right places. Just want to put you in the right direction.

No way. To make this you should declare a C# structure and, therefore, that structure will always be understood as a managed type, and you cannot declare a pointer to a managed type. The only thing you could do is using a byte* and manually calculate the offset and size for each field in the unmanaged object, but you cannot map a C# structure to a pointer becouse, as I have said, a C# structure is always understood as a managed type.

Answering your own question when you find a solution is usually a good practice but, in this case, I think you are going a bit too far.