C++ problem BGI ERROR

Question

have made a program in c++. My program is running fine, but at the
end of the program there is a error message on the screen:

Bgi Error: Graphics not initialized (use initgraph)

My program shows no error message at compile time or at run time.
What's this bgi error? How can I correct this? I have initialized the
graphics hardware by using the initgraph function on the main segment
of my program. I am using Borland Turbo c++ compiler 3.1.please can anyone provide me a stepwise procedure to solve this