Use the VBA msoFileDialogFilePicker to browse for and select files with a macro. The msoFileDialogFilePicker property is part of the Application.FileDialog family in Excel and behaves much like the GetOpenFileName method.
This tutorial will demonstrate how to use Excel VBA to send emails with attachments, and we will take a detailed look at the Attachments object, which is actually a collection. It's quite easy to attach files to an email using Excel VBA.
VBA DoEvents yields execution of your macro, so your computer processor will be able to simultaneously run other tasks. The VBA DoEvents function also enables interruption of code execution so it's easier to stop a running macro.
Use VBA to send emails from Excel with Outlook. This tutorial provides a macro for sending emails from Excel, tells you how to use Excel VBA to send emails with attachments and add a body to your emails.