U I

[subhojyoti]

I would like other programs to minimise as soon as my exe is initialised

Subho

This will do the work:

http://support.microsoft.com/support/kb/articles/Q194/9/14.ASP

Good luck

[Lothar Haensler]

MSDN article Q194914 has the details including VB source code.
You basically mimic the WindowsKey+M keyboard combination by calling the keybd_event API.