https://learn.microsoft.com/fr-fr/dotnet/api/system.windows.forms.toolstrippanelrow.onboundschanged?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
ToolStripPanelRow.OnBoundsChanged(Rectangle, Rectangle) Method (System.Windows.Forms) | Microsoft...
Occurs when the Bounds property changes.
windows formsrectanglemethodsystemmicrosoft