Form flickering problem

[C# Programming]

Hi,
My application has a heavy form (meaning with lots of images etc.) and after I minimize it and then maximize it the form flickers for 2-3 seconds. I've tried to set DoubleBuffered property of my form to true and tried all kinds of SetStyle combinations but nothing helped. Is there anyone out there who has any idea how I can solve this problem or workaround it?

Thanks in advance.