+ * modest_ui_actions_compose_msg
+ * @win: Modest main window (can be NULL)
+ * @to_str: "To:" header, or NULL
+ * @cc_str: "Cc:" header, or NULL
+ * @bcc_str: "Bcc:" header, or NULL
+ * @subject_str: Subject of the message, or NULL
+ * @body_str: Body of the message (without signature), or NULL
+ * @attachments: attachments List of file URIs to attach
+ * @set_as_modified: wheter or not the message is set initially as modified or not
+ *