How share files direct to dropbox via intent?

Hi all.

The dropbox have a intent to share files, i see the dropbox when i want share a simple image on Android.

Now my question is, how share a image or file direct to dropbox via intent? like the user selected the dropbox icon?

I dont want show all apps to share, only share direct via intent.

for the google drive i use this

 

Dim u As Uri
u.Parse("file://" & File.Combine(folder,imagefile))
Dim i As Intent
i.Initialize(i.ACTION_SEND,"")
i.SetType("image/*")
i.SetComponent("com.google.android.apps.docs/.shareitem.UploadSharedItemActivity")
i.PutExtra("android.intent.extra.STREAM",u)
StartActivity(i)


com.google.android.apps.docs


but for dropbox? what the correct?
i m tryed com.dropbox.android but dont works, show anothers apps 

many thx