check these instructions:
Run Your Program
From the Menu Bar: Debug-Run
This will launch a window and run your program in it. After it finishes the window will go inactive and you will probably have to close it manually by clicking the 'x' icon in the upper right corner.
If the present window is one not your source code window - for instance, it will probably be the Message window after compiling and/or linking the program - then you will get a "Could not create process." error. This is because you are trying to execute the contents of a window that doesn't contain a program. Select the source code window and try again.
Source: http://www.dragonwins.com/courses/ECE1021/STATIC/LESSONS/IntroToTurboC.htm#Run%20Your%20Program