Custom Popup Control Sample
This sample creates a control that inherits from TextBox and behaves like a Popup. The control contains a Popup and defines the properties, IsOpen, Placement, PlacementRectangle, PlacementTarget, HorizontalOffset, and VerticalOffset. When IsOpen is set the true, the control calls Popup.CreateRootPopup to bind these six properties to the respective properties on the Popup.
This sample demonstrates a specific feature of the Windows Presentation Foundation and, consequently, does not follow application development best practices. For comprehensive coverage of Windows Presentation Foundation (WPF) and Microsoft .NET Framework application development best practices, refer to the following as appropriate:
Accessibility - Accessibility Best Practices
Security - Windows Presentation Foundation Security
Localization - WPF Globalization and Localization Overview
Install the Windows Software Development Kit (SDK) and open its build environment command window. On the Start menu, point to All Programs, Microsoft Windows SDK, and then click CMD Shell.
Download the sample, usually from the software development kit (SDK) documentation, to your hard disk drive.
To build the sample from the build environment command window, go to the source directory of the sample. At the command prompt, type MSBUILD.
To build the sample in Microsoft Visual Studio, load the sample solution or project file and then press CTRL+SHIFT+B.