Save Window Placement State Sample
[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]
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
Localization - WPF Globalization and Localization Overview
Performance - Optimizing WPF Application Performance
Security - Windows Presentation Foundation Security
Building the Sample
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.
Running the Sample
To run the compiled sample from the build environment command window, execute the .exe file in the Bin\Debug or Bin\Release folder contained under the sample source code folder.
To run the compiled sample with debugging in Visual Studio, press F5.
This sample illustrates how to save the size, location, and state of a Window so the Window opens in the same position it was closed. Furthermore, this sample is multi-monitor aware, which means that if the monitor on which the Window was closed is disconnected, the Window is shown on a connected monitor instead.
This requires using the following Win32 APIs (from User32.dll):
WINDOWPLACEMENT: To store window size, location, and state (see WINDOWPLACEMENT Structure).
GetWindowPlacement: To retrieve the current WINDOWPLACEMENT data for the window before it closes (see GetWindowPlacement Function).
SetWindowPlacement: To restore the WINDOWPLACEMENT data when the window opens (see SetWindowPlacement Function).
The WINDOWPLACEMENT structure is physically stored on disk using the Microsoft .NET Framework support for strongly-typed application settings (see Application Settings Overview).