Dim iIntent As Intent
iIntent.Initialize(iIntent.ACTION_VIEW, "file:///sdcard/MyAPK.apk")
iIntent.SetType("application/vnd.android.package-archive")
StartActivity(iIntent)
Work fine but do you know if it's possible to Install this APk automaticly and not show the instalation wizard?
No. For security reasons the user must manually accept the installation of an apk after checking that they are happy with the permissions that it requires unless the apk is being installed via the adb utility.