Help please - WM_SYSCOMMAND message from Aero Shake/3D flip

Question

HI

I have an application written in Delphi 2006. I have noticed that when running under windows 7 the application does not receive the WM_SYSCOMMAND message from Aero Shake. However if I run the application as administrator then it does receive the WM_SYSCOMMAND when performing Aero Shake.

I've tried calling ChangeWindowMessageFilter for WM_SYSCOMMAND and get a result of True indicating that the call succeeded but I still can't get the WM_SYSCOMMAND message frmo Aero Shake.

Does anyone know why and how I can fix this?

Thank you

Answer 1

I've solved this, in order to get the WM_SYSCOMMAND message you need to elevate the application to at least highestAvailable using an application manifest. After doing this everything works perfectly except that you now get the elevation confirmation dialog when starting the application.

Answer 2

This discussion of the behaviour of AeroSnap/Shake in the presence (or otherwise) of MOVE message handling and/or specific window frame styles may provide some assistance.