---
title: "Deactivate Function - WPF unmanaged API reference"
titleSuffix: ""
ms.date: "03/30/2017"
dev_langs: 
  - "cpp"
api_name: 
  - "Deactivate"
api_location: 
  - "PresentationHost_v0400.dll"
ms.assetid: 3e81be16-24c7-4399-b242-6268feaa49d7
---
# Deactivate Function (WPF Unmanaged API Reference)
This API supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code.  
  
 Used by the Windows Presentation Foundation (WPF) infrastructure for windows management.  
  
## Syntax  
  
```cpp  
void Deactivate()  
```  
  
## Requirements  
 **Platforms:** See [.NET Framework System Requirements](/dotnet/framework/get-started/system-requirements).  
  
 **DLL:**  
  
 In the .NET Framework 3.0 and 3.5: PresentationHostDLL.dll  
  
 In the .NET Framework 4 and later: PresentationHost_v0400.dll  
  
 **.NET Framework Version:** Available since 3.0  
  
## See also

- [WPF Unmanaged API Reference](wpf-unmanaged-api-reference.md)