# GH_MultiColourPalette.SelectionChangedEventHandler delegate

Namespace: [Grasshopper.GUI.Colours](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.gui.colours.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public delegate GH_MultiColourPalette.SelectionChangedEventHandler
```

**Signature:**

```cs
void GH_MultiColourPalette.SelectionChangedEventHandler(GH_MultiColourPalette sender, GH_MultiColourPaletteEventArgs e)
```

**Parameters:**

- `sender` ([GH_MultiColourPalette](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.colours.gh-multicolourpalette.md))
- `e` ([GH_MultiColourPaletteEventArgs](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.colours.gh-multicolourpaletteeventargs.md))