I'm not using Window anymore, but here is my notes for w7 and it still works fine for me:
graphics.h
Global compiler settings/Toolchain executables:
Compiler's installation directory:
C:\TDM-GCC-32
Program Files:
C compiler: : g++.exe
C++ compiler : g++.exe
Linker dynamic libs: g++.exe
linker static libs : ar.exe
Debugger : GDC/CDB debugger: Default
Resource compiler : windres.exe
Make program : mingw32-make.exe
Compiler's installation directory:
C:\TDM-GCC-32
Linker settings:
//-lbgi -lgdi32 -lcomdlg32 -luuid -loleaut32 -lole32
C:\TDM-GCC-32\lib\libbgi.a
C:\TDM-GCC-32\lib\libgdi32.a
C:\TDM-GCC-32\lib\libcomdlg32.a
C:\TDM-GCC-32\lib\libuuid.a
C:\TDM-GCC-32\lib\liboleaut32.a
C:\TDM-GCC-32\lib\libole32.a
Debugger:
C:\TDM-GCC-32\gdb32\bin\gdb32.exe
#include <graphics.h>
int main() {
initwindow(640, 480, "Graphics test", 0, 300);
int x1 = 100, y1 = 200, x2 = 500, y2 = 400;
moveto(x1, y1);
lineto(x1, y2);
lineto(x2, y2);
lineto(x2, y1);
lineto(x1, y1);
getchar();
return 0;
}