Refresh / Repaint is taking much time

Question

Hi friends,
I am displaying background image in a panel in windows forms and then drawing on top of it. I am able to draw it properly, but when I scroll down then back up, even I call revalidate or refresh it takes more than 5-6 seconds to again display the drawn images. On some website I read about checking the transparency value, but I hadnt setup and transparency value.

iinf · Answer

Thanks for the reply Sam. Actually even when I am calling invalidate method it is not calling Onpaint. Whereas on minimizing and maximizing the window it call onpaint()

Sam Hobbs · Answer

It depends on many things that your program is doing  that you don't specify. In other words, based on the description provided, I really doubt that anyone has any idea of why your program is taking more than 5-6 seconds to show the images again.
I suggest that you take advantage of some of the abundant articles and books about graphics in Windows. This web site has many good articles.