Call Cancel from Custom Action in .Net Windows Installer Project

As an alternative to using the “Rollback” or “InstallException” approach, simply use pinvoke/interop to call the cancel button on the base installer form directly.

(see my related post for more detail and full code)

ShowWindow(msiwindowhandle, ShowWindowCommands.Show);
                IntPtr cancelbuttonhandle;
                const int BM_CLICK = 0x00F5;
                msiwindowhandle = FindWindow("#32770", InstallTitle);
                cancelbuttonhandle = FindWindowEx(msiwindowhandle, IntPtr.Zero, "Button", "Cancel");
                SetActiveWindow(msiwindowhandle); //necessary for button click to fire
                SendMessage(cancelbuttonhandle, BM_CLICK, IntPtr.Zero, IntPtr.Zero);

References
https://ronniediaz.com/2011/06/20/the-savedstate-dictionary-does-not-contain-the-expected-values-and-might-have-been-corrupted/

About Ronnie Diaz

Ronnie Diaz is a software engineer and tech consultant. Ronnie started his career in front-end and back-end development for companies in ecommerce, service industries and remote education. This work transitioned from traditional desktop client-server applications through early cloud development. Software included human resource management and service technician workflows, online retail e-commerce and electronic ordering and fulfillment, IVR customer relational systems, and video streaming remote learning SCORM web applications. Hands on server experience and software performance optimization led to creation of a startup business focused on collocated data center services and continued experience with video streaming hardware and software. This led to a career in Amazon Prime Video where Ronnie is currently employed, building software and systems which stream live sports and events for millions of viewers around the world.

Posted on June 20, 2011, in Programming & Development and tagged , , , , , , , , , . Bookmark the permalink. Leave a comment.

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