The easiest way to run this application is to install the emulation software called DosBox. If you have installed the game, download and install DosBox and start it.
At first, you should mount the directory using this command: mount C:\ D:\Games\redalert where D:\Games\redalert is the path to your RedAlert installation. Use C:, then type the executable name and the game will run with mouse support, textures and everything that it's needed for smooth gameplay.