Ok, je pense que j'ai trouvé en fait:
rollout gifUI "GIF UI" width:210 height:210
(
dotNetControl dncPanel "FlowLayoutPanel" width:200 height:200 pos:[5,5]
on gifUI open do
(
local pbx = dotNetObject "PictureBox"
pbx.Width = 200
pbx.Height = 200
pbx.Margin = dotNetObject "Padding" 0
pbx.Image = (dotNetClass "System.Drawing.Image").FromFile @"C:\file.gif"
dncPanel.Controls.Add pbx
)
)
createDialog gifUI