Click here to Skip to main content
11,409,854 members (61,730 online)
Click here to Skip to main content

Window Sizer

, 7 Aug 2002 CPOL
Rate this:
Please Sign up or sign in to vote.
A hot-key based program that lets you resize your current window to any size. Useful for web designers and GUI developers as it helps avoid frequent screen-resolution changes.


Window Sizer is a little program that I wrote when I was having to frequently change screen resolutions when testing web pages or GUI applications to make sure that they worked alright in other resolutions than my default one. Often we also had requests from clients with weird specifications like a maximum window size of 600 x 600 or something equally bizarre. Then I found that when I was editing CP articles I had to switch to 800 x 600 to make sure that the article looked fine in that resolution too. All this culminated in this little app that you see.


Just run the app once, probably at windows startup. Just drag a short cut to the Start-Menu's Startup-folder. You'll see a green tree icon on your system tray. That's to let you know that Window Sizer is active. Now just make your window active by clicking on it and press CTRL-ALT-F12 which is the keyboard shortcut that brings up Window Sizer. Now you can choose one of the resolutions from the list box or use a custom resolution, and then click on Resize to resize the window to that size. If you close the Window Sizer window the program won't exit, it simply hides itself. The resolution list in the list box will never exceed your screen resolution. Thus if you are on 800 x 600, don't expect to see 720 x 720 in the list box. But you can type what you feel like into the Custom size text boxes at your own risk of course. You can exit the program by right clicking on the task tray and choosing Exit.

Technical details

Basically we use GetForegroundWindow() to get the current window. This usually works better than GetActiveWindow() on XP and 2K because they have some kind of funny option that when set prevents windows from taking over the focus. This means we end up with crazy situations where the foreground window may not be the active window and vice versa. Now we use MoveWindow() to resize the window. If the resizing gets the window out of screen, we center the window on the screen. We also remove the WS_MAXIMIZE if it is set because otherwise the OS will not know that the window has been un-maximized. Initially I had over-looked such a contingency and had experienced some weird side effects.


I'd like to thank David Wulff and Roger Wright for doing some quick testing for me. It was okay when I alone was using it, but when I thought of CP-ing it, I wanted some external testing and these two gentlemen helped me by testing out the application. Of course there might be a few bugs left for all I know. But I am hoping on getting some quality feedback and suggestions as usual.


  • Aug 08 2002 - Added an MSI Installer


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Nish Nishant

United States United States
Nish Nishant is a Software Architect/Consultant based out of Columbus, Ohio. He has over 15 years of software industry experience in various roles including Lead Software Architect, Principal Software Engineer, and Product Manager. Nish is a recipient of the annual Microsoft Visual C++ MVP Award since 2002 (13 consecutive awards as of 2014).

Nish is an industry acknowledged expert in the Microsoft technology stack. He authored
C++/CLI in Action for Manning Publications in 2005, and had previously co-authored
Extending MFC Applications with the .NET Framework for Addison Wesley in 2003. In addition, he has over 140 published technology articles on and another 250+ blog articles on his
WordPress blog. Nish is vastly experienced in team management, mentoring teams, and directing all stages of software development.

Contact Nish : You can reach Nish on his google email id voidnish.

Website and Blog

Comments and Discussions

QuestionNo download link pops up!! PinmemberMember 955539629-Oct-12 9:30 
AnswerRe: No download link pops up!! PinmvpNish Sivakumar29-Oct-12 9:38 
QuestionWindow Sizer Pinmemberwwmjava18-Oct-12 15:49 
I have used this utility for years. It's great.
Could you make one that adjusted the size of all active windows with one click? Smile | :)
QuestionNot working in windows 7 PinmemberDeepak.Prahlad15-Aug-11 21:10 
AnswerRe: Not working in windows 7 Pinmembervvqboy5-Aug-14 22:15 
GeneralNeed to set a size for the windows contents, excluding the window border PinmemberAdam Reece16-May-11 7:20 
GeneralMy vote of 4 PinmemberPatrick Kalkman23-Jan-11 6:00 
GeneralGreat Article PinmemberGaurav Dudeja India19-Apr-10 1:47 
Questionis there a newer or similar free version out now? Pinmemberjuly churches10-Oct-08 9:15 
GeneralCtrl+Alt+F12 Does Not Work PinmemberKirill Osipov9-Oct-07 21:05 
GeneralRe: Ctrl+Alt+F12 Does Not Work PinmemberDeepak.Prahlad15-Aug-11 21:12 
GeneralVery Cool Nish PinmemberJeffrey Walton15-Dec-06 13:53 
Generalactive window Pinmemberkrishnachandran18-Dec-05 19:25 
GeneralProblem related to COM Wrapper Pinmemberparesh_vs15-Nov-04 4:02 
QuestionCan not resize Yahoo Messenger 6.0 window PinmemberJList9-Oct-04 8:16 
GeneralWindow Sizer PinsussWayland Moncrief5-Dec-03 9:53 
GeneralBitmap stretching Pinmembercollincode15-Sep-03 20:49 
GeneralRe: Bitmap stretching PineditorNishant S15-Sep-03 22:18 
GeneralResizing IE PinsitebuilderUwe Keim19-Jul-03 22:41 
GeneralGreat work! PinmemberRyan Binns26-Mar-03 19:44 
GeneralWindow Sizer Predefined sizes PinmemberPaul Farry13-Mar-03 18:15 
GeneralRe: Window Sizer Predefined sizes PineditorNishant S13-Mar-03 20:46 
GeneralThis is what I was looking for PinmemberWillemM3-Mar-03 21:39 
GeneralRe: This is what I was looking for PineditorNishant S8-Mar-03 6:15 
GeneralStandard Window Sizes PinmemberIanL19-Feb-03 23:58 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web01 | 2.8.150414.5 | Last Updated 8 Aug 2002
Article Copyright 2002 by Nish Nishant
Everything else Copyright © CodeProject, 1999-2015
Layout: fixed | fluid