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

[Necromantic mode = ON]

You have 1000 row of data, but you only can show a few of them, so create only the controls that will be visible, and reuse them changing its content with the new data when you scroll.