App disappears from Win7's ALT-TAB list sometimes

Question

I've been having some trouble with one of my Delphi 2010 projects lately. It seems that sometimes, when I have a form open as a modal dialog, the app stops showing up in the ALT-TAB list until I close the dialog. It's still in the Taskbar, but not in ALT-TAB, which means I can't switch to it without using the mouse.

Running under Windows 7, 64-bit. Has anyone seen this before? Any idea what causes it and how to fix it?

Answer 1

Previously i got the same problem while converting the code from Delphi - 2006 to Delphi - 2007.

I fixed that by adding in dpr file

Application.MainFormOnTaskBar := True;

Similar kind of problem was posted in below links. Refer them it may be helpful to you

https://forums.codegear.com/thread.jspa?messageID=188059

http://www.delphigroups.info/2/4/365859.html