I've a custom Action on Deployment project of .NET Applicaiton, which contains custom dialogbox to enter certain parameters, on invalid parameters I've shown MessageBox.Show - but its being hide by installer window, I tried windows forms too with Activate, TopMost, Focus,bring2front, etc serveral options but it comes by default behind the windows installer window and due to this user is not able to identify why installing process is not finishing - because actually its waiting for user to read the MessageBox and press OK.

I've tried to implement IWin32Window with the handler of MsiExec Process, and shown the Messagebox but still its not working, anyone has idea ???

Here is my installer.cs function defination,

public override void Install(IDictionary stateSaver)