Super slow C# custom control

Question

I\'ve made a custom control, it\'s a FlowLayoutPanel, into which I put a bunch of other custom controls (just Buttons, each with three Labels and a PictureBox overlayed)

Answer 1

Can a C# WinForm app handle 1000 instances of any type of control? I am no WinForm Guru, but what you are expecting from your application might be unreasonable.

The fact that you want to show 1000+ controls of any type might be a sign that you are approaching the design of your software from the wrong direction.