1. Run Join (Merge, Combine) Multiple WMV or ASF Files Into One Software.
2. Click the "Add WMV/ASF File(s)" button to add files. Then an open file dialog will appear, hold CTRL or SHIFT key to select multiple files. To add all files in a folder, click "Add All WMV/ASF Files in Folder" then select a folder.
3. To start joining the selected files/documents, click the "Join!" button.