How I set External email in sent by

[ohm_g7]

I want to create Zimlet to set external account.
I have 2 questions. please let me no about answer.

1 . I want to get email of external account
How I get it.(I want example code)

2. I want to know how I set that email in "Account:" field.

Thank you for answer.

[ohm_g7]

I think I can get external account from

var identityCollection = appCtxt.getIdentityCollection();
var identities = identityCollection.getIdentities();

but I not know how I set account I want to use .
I saw this this line

this.identitySelect.setSelectedValue(params.identi ty.id);

but I cannat use "this"

How I do
Please tell me
Thank you

[ohm_g7]

I know how I set this

var tempCompose = AjxDispatcher.run("GetComposeController");
tempCompose._composeView.identitySelect.setSelecte dValue(id_of_external);
if (appCtxt.get(ZmSetting.SIGNATURES_ENABLED)) {
tempCompose._composeView._controller.setSelectedSi gnature(signature_id || "");
tempCompose._composeView.reset()
}