Send app. to background

Here the code to send your GUI application in background:

#include <apgtask.h>
// link against: apgrfx.lib

TApaTask task(iEikonEnv->WsSession( ));
TInt wgId = CEikonEnv::Static()->RootWin().Identifier();
task.SetWgId(wgId);
task.SendToBackground();