Select 'DWG' or 'AutoCAD Drawing Database File (.dwg)' in the Output Format menu.Select 'TCW' or 'TurboCAD Drawing File (.tcw)' in the Input Format menu if the program does not automatically read your file's format.Many TurboCAD and AutoCAD file conversion programs allow 'batch conversion,' meaning you can add and convert many files at a time. Click 'Add File' or 'Choose File' and browse your computer's documents for the TCW file you want to convert.