header in multiple .cpp files?

1>------ Build started: Project: SimpleRPG, Configuration: Debug Win32 ------
1>Build started 25/07/2011 11:41:37 AM.
1>InitializeBuildStatus:
1>  Touching "Debug\SimpleRPG.unsuccessfulbuild".
1>ClCompile:
1>  main.cpp
1>ManifestResourceCompile:
1>  All outputs are up-to-date.
1>test.obj : error LNK2005: "void __cdecl Gotoxy_color(short,short,short)" (?Gotoxy_color@@YAXFFF@Z) already defined in GFX.obj
1>test.obj : error LNK2005: "void __cdecl Color(short)" (?Color@@YAXF@Z) already defined in GFX.obj
1>test.obj : error LNK2005: "void * hConsole" (?hConsole@@3PAXA) already defined in GFX.obj
1>Debug\SimpleRPG.exe : fatal error LNK1169: one or more multiply defined symbols found
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:01.76
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

#ifndef GOTOXY
#define GOTOXY

#include <Windows.h>

HANDLE hConsole;
 


	void Gotoxy_color ( short x ,short y, short color) 
{


	COORD Goto = {x, y};
	SetConsoleCursorPosition ( GetStdHandle ( STD_OUTPUT_HANDLE ), Goto );

	SetConsoleTextAttribute  ( GetStdHandle ( STD_OUTPUT_HANDLE ), color );

}

	void Color ( short color )
	{

	SetConsoleTextAttribute  ( GetStdHandle ( STD_OUTPUT_HANDLE ), color );

	
	}



#endif GOTOXY