Cannot refer to enum in header

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C++

Hello,
I trying to self-learn C++ and don't have much idea about header files. When I tried to create one as follows, I got a strange error that I do not understand. I have tried googling but my lack of understanding about C++ compiling/linking process is an obstacle.


Anyway, here is the header file (unnecessary code removed)

GraphicsLib.h

#ifndef GRAPHICS_LIB_INCLUDE
#define GRAPHICS_LIB_INCLUDE

enum BorderTypes
{
SINGLE_ALL,
DOUBLE_ALL,
SINGLE_SIDE_DOUBLE_TOP,
DOUBLE_SIDE_SINGLE_TOP
};

static void DrawMessageWithBox(std::string message, BorderTypes borderType, int length);
#endif // GRAPHICS_LIB_INCLUDE

The GraphicsLib.cpp file

include "GraphicsLib.h"

static void DrawMessageWithBox(string message, BorderTypes borderType, int length)
{
    //Draw the box and the message

}

The main program

#include<iostream>
#include "GraphicsLib.h"
using namespace std;

int main()
{
   DrawMessageWithBox("HELLO WORLD", BorderTypes.DOUBLE_ALL, 77);

   return 0;
}

Whenever I try to compile the program, I get this error -

"[ERROR] Expected primary-expression before '.' token"

If I replace the function call with this one,

DrawMessageWithBox("HELLO WORLD", DOUBLE_ALL, 77);

I get the following error -
"[Warning] 'void DrawCenteredMessageWithBox(std::string, BorderTypes, int)' used but never defined [enabled by default]"
In function 'main':
"undefined reference to `DrawCenteredMessageWithBox(std::string, BorderTypes, int)' "


Can anyone please tell me what am I doing wrong?
Thanks.