Qt application auto-updater?

[javed_alam786]

i am doing the exactly what squidge is saying. My separate app checks and downloads the SIS file (new updated version of the app) and asks the user to install it but how do i execute this SIS file automatically on the handset (Nokia E52).

I have tried

qStartIntall = new QProcess();
qStartIntall->start("C:\\Data\\DownloadedApp.SIS");

qStartIntall = new QProcess();
qStartIntall->start("C:\\Data\\DownloadedApp.SIS");

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but i get error "QProcess::FailedToStart"

Please help.