# SearchBegin

> Called when a new search query begins, for the view model running the search.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Hierarchy](/engine/6000.7/script-reference/unity/hierarchy.md)
* **Assembly:** UnityEngine.HierarchyCoreModule

## SearchBegin(HierarchySearchQueryDescriptor, HierarchyViewModel)

Called when a new search query begins, for the view model running the search.

```csharp
protected virtual void SearchBegin(HierarchySearchQueryDescriptor query, HierarchyViewModel viewModel)
```

### Parameters

**** (\[HierarchySearchQueryDescriptor]\(/engine/6000.7/script-reference/unity/hierarchy/hierarchysearchquerydescriptor)): The search query descriptor.**** (\[HierarchyViewModel]\(/engine/6000.7/script-reference/unity/hierarchy/hierarchyviewmodel)): The view model running the search. Use it to store per search state.

## SearchBegin(HierarchySearchQueryDescriptor)

Called when a new search query begins.

> **Warning:**
>
> **Deprecated.** Use the overload that takes a HierarchyViewModel.

```csharp
protected virtual void SearchBegin(HierarchySearchQueryDescriptor query)
```

### Parameters

**** (\[HierarchySearchQueryDescriptor]\(/engine/6000.7/script-reference/unity/hierarchy/hierarchysearchquerydescriptor)): The search query descriptor.