Linker Error in C++ [duplicate]

I am quite new to C++ and I am using a book to get into computergrafics. I am using Visaul Studio 2013 and Windows 8. When I try to rebuild the solution, I get the following Errors:

1 error LNK2001:unresolved external symbol "_wWinMain@16". C:\application\gl_application\gl_application\MSVCRT.lib(wcrtexew.obj) gl_application 2 error LNK1120: unresolved external symbol C:\application\gl_application\Release\gl_application.exe 1 1 gl_application 

I took the following code right from the book and all advises a found online didnt help.

application.cpp

 #include <glut.h> #include "screen_interface.h" #include "global_definitions.h" #include "palette.h" void main_loop( void ) { for( long x=0 ; x<256 ; x++ ) for( long y=0 ; y<480 ; y++ ) screen[ y * 640 + x ] = palette[ x ]; glDrawPixels( x_res, y_res, GL_BGRA_EXT, GL_UNSIGNED_BYTE, screen ); glFlush(); } void initialise_world( void ) { initialise_platform(); display_func = 1; } void display( void ) { switch( display_func ) { case 0 : initialise_world(); break; case 1 : main_loop(); break; default : display_message(); } } int main( int argc, char **argv ) { glutInit( &argc, argv ); glutInitDisplayMode( GLUT_SINGLE | GLUT_RGBA ); glutInitWindowSize( x_res, y_res ); glutCreateWindow( "3D-Grafik Programmierung" ); glutKeyboardFunc( key_down ); glutSpecialFunc( special_down ); glutDisplayFunc( display ); glutIdleFunc( display ); glMatrixMode( GL_PROJECTION ); glLoadIdentity(); gluOrtho2D( 0, x_res, y_res, 0 ); glRasterPos2d( 0, 0 ); glPixelZoom( 1, -1 ); glClear( GL_COLOR_BUFFER_BIT ); glutMainLoop(); return 0; } 

And this Header files: Screen_interface.h

#ifndef SCREEN_INTERFACE_H #define SCREEN_INTERFACE_H #define _CRT_SECURE_NO_WARNINGS #include <time.h> #include <stdio.h> #include <string.h> #include <glut.h> #include "simple_types.h" const long x_res = 640, y_res = 480; long display_func = 0; long message_sx = 0, message_sy = 0; char message_text[ 10000 ]; long write( long sx, long sy, char *message ) { long begin_x = sx; for( unsigned long x=0 ; x<strlen( message ) ; x++ ) { if( message[ x ] == '\n' ) { sx = begin_x; sy += 12; continue; } if( message[ x ] == '\t' ) { sx = ((sx / 64) + 1) * 64; continue; } glRasterPos2d( sx, sy ); glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, message[ x ] ); sx += glutBitmapWidth( GLUT_BITMAP_HELVETICA_12, message[ x ] ); } return sy; } void display_message( void ) { GLfloat c[ 4 ]; glGetFloatv( GL_COLOR_CLEAR_VALUE, c ); glColor3ub( 0, 0, 0 ); long sy = write( message_sx, message_sy, message_text ); glColor3ub( 0, 0, 200 ); if( display_func == 2 ) write( message_sx, sy, "\n\nDruecken Sie eine beliebige Taste, um das Programm fortzusetzen.\n" ); if( display_func == 3 ) write( message_sx, sy, "\n\nDruecken Sie eine beliebige Taste, um das Programm zu beenden.\n" ); glClearColor( c[ 0 ], c[ 1 ], c[ 2 ], c[ 3 ] ); glFlush(); } void set_message( char *message ) { unsigned long x; long tmp_width = 0, text_width = 0, text_height = 0; for( x=0 ; x<strlen( message ) ; x++ ) { if( message[ x ] == '\n' ) { text_height += 12; if( tmp_width > text_width ) text_width = tmp_width; tmp_width = 0; continue; } if( message[ x ] == '\t' ) { tmp_width = ((tmp_width / 64) + 1) * 64; continue; } tmp_width += glutBitmapWidth( GLUT_BITMAP_HELVETICA_12, message[ x ] ); } if( text_width < 288 ) text_width = 288; message_sx = (x_res - text_width) / 2; message_sy = (y_res - text_height) / 2; glClearColor( 1, 1, 1, 1 ); glClear( GL_COLOR_BUFFER_BIT ); sprintf( message_text, "%s", message ); } void exit_error( char *message ) { printf( "\nAbbruch der Programmausfuehrung nach einem schwerwiegenden Fehler:\n\n\n%s\n\n\n", message ); exit( 1 ); } void set_exit( char *message, char *user ) { char string[ 500 ]; sprintf( string, "%s\n\n%s\n", user, message ); exit_error( string ); } void exit_nofile( char *user, char *filename ) { char string[ 500 ]; sprintf( string, "%s: Fehler beim Oeffnen der Datei '%s'.\n", user, filename ); exit_error( string ); } void exit_nomemory( char *user, char *array ) { char string[ 500 ]; sprintf( string, "%s: Fehler waehrend der Reservierung von Arbeitsspeicher fuer das Array '%s'.\n", user, array ); exit_error( string ); } #endif 

global_definitons.h

#ifndef GLOBAL_DEFINITIONS #define GLOBAL_DEFINITIONS #include "simple_types.h" pixel_32 *screen = NULL; void initialise_platform( void ) { if ( (screen = new pixel_32[ x_res*y_res ]) == NULL ) exit_error( "initialise_world(): Fehler bei der Reservierung von Arbeitsspeicher.\n" ); } void destroy_world( void ) { if( screen ) delete [] screen; } void key_down( uchar key, int mouse_sx, int mouse_sy ) { if( display_func == 2 ) { display_func = 1; glRasterPos2i( 0, 0 ); return; } else { destroy_world(); exit( 1 ); } } void special_down( int key, int mouse_sx, int mouse_sy ) { if( display_func == 2 ) { display_func = 1; glRasterPos2i( 0, 0 ); return; } else { destroy_world(); exit( 1 ); } } #endif 

Simple_Types.h

#ifndef SIMPLE_TYPES_H #define SIMPLE_TYPES_H #include <math.h> typedef unsigned char uchar; typedef unsigned short ushort; typedef unsigned long ulong; struct pixel_32 { uchar blue, green, red, alpha; pixel_32( void ) : red( 0 ), green( 0 ), blue( 0 ), alpha( 0 ) { } pixel_32( uchar r, uchar g, uchar b ) : red( r ), green( g ), blue( b ), alpha( 0 ) { } }; #endif 

Palette.h

#ifndef PALETTE_H #define PALETTE_H #include "simple_types.h" pixel_32 palette[ 256 ] = { pixel_32( 2, 2, 3 ), pixel_32( 3, 2, 171 ), pixel_32( 3, 171, 3 ), pixel_32( 3, 170, 170 ), pixel_32( 170, 2, 2 ), pixel_32( 170, 2, 171 ), pixel_32( 170, 87, 2 ), pixel_32( 171, 171, 170 ), pixel_32( 87, 87, 86 ), pixel_32( 87, 87, 254 ), pixel_32( 86, 255, 86 ), pixel_32( 87, 254, 255 ), pixel_32( 254, 86, 86 ), pixel_32( 255, 86, 254 ), pixel_32( 255, 254, 86 ), pixel_32( 255, 255, 255 ), pixel_32( 2, 3, 2 ), pixel_32( 23, 23, 22 ), pixel_32( 34, 34, 34 ), pixel_32( 46, 46, 47 ), pixel_32( 59, 58, 59 ), pixel_32( 71, 71, 71 ), pixel_32( 83, 83, 83 ), pixel_32( 99, 99, 98 ), pixel_32( 115, 114, 115 ), pixel_32( 131, 131, 130 ), pixel_32( 146, 147, 146 ), pixel_32( 162, 163, 163 ), pixel_32( 183, 183, 183 ), pixel_32( 203, 202, 203 ), pixel_32( 227, 226, 227 ), pixel_32( 255, 255, 255 ), pixel_32( 3, 3, 254 ), pixel_32( 66, 2, 254 ), pixel_32( 126, 3, 255 ), pixel_32( 191, 2, 255 ), pixel_32( 254, 3, 254 ), pixel_32( 254, 3, 191 ), pixel_32( 255, 2, 126 ), pixel_32( 254, 2, 67 ), pixel_32( 255, 3, 2 ), pixel_32( 255, 66, 2 ), pixel_32( 254, 127, 2 ), pixel_32( 255, 191, 3 ), pixel_32( 254, 255, 3 ), pixel_32( 191, 254, 2 ), pixel_32( 126, 254, 2 ), pixel_32( 66, 254, 2 ), pixel_32( 2, 254, 2 ), pixel_32( 3, 254, 67 ), pixel_32( 3, 255, 127 ), pixel_32( 3, 254, 191 ), pixel_32( 3, 254, 255 ), pixel_32( 2, 191, 254 ), pixel_32( 3, 126, 255 ), pixel_32( 2, 66, 254 ), pixel_32( 127, 127, 254 ), pixel_32( 159, 127, 255 ), pixel_32( 191, 126, 255 ), pixel_32( 222, 127, 255 ), pixel_32( 254, 127, 254 ), pixel_32( 254, 127, 223 ), pixel_32( 255, 127, 190 ), pixel_32( 254, 127, 158 ), pixel_32( 255, 126, 126 ), pixel_32( 254, 159, 126 ), pixel_32( 254, 191, 126 ), pixel_32( 255, 222, 126 ), pixel_32( 255, 254, 126 ), pixel_32( 223, 255, 126 ), pixel_32( 191, 255, 127 ), pixel_32( 158, 254, 127 ), pixel_32( 126, 254, 126 ), pixel_32( 126, 254, 158 ), pixel_32( 127, 254, 191 ), pixel_32( 127, 255, 223 ), pixel_32( 127, 255, 255 ), pixel_32( 126, 222, 255 ), pixel_32( 126, 190, 255 ), pixel_32( 127, 159, 255 ), pixel_32( 183, 182, 255 ), pixel_32( 198, 183, 254 ), pixel_32( 218, 183, 255 ), pixel_32( 234, 183, 255 ), pixel_32( 255, 182, 255 ), pixel_32( 255, 183, 235 ), pixel_32( 254, 182, 218 ), pixel_32( 255, 183, 199 ), pixel_32( 254, 183, 183 ), pixel_32( 254, 198, 182 ), pixel_32( 254, 219, 183 ), pixel_32( 254, 234, 183 ), pixel_32( 255, 255, 182 ), pixel_32( 234, 254, 183 ), pixel_32( 218, 254, 182 ), pixel_32( 198, 255, 182 ), pixel_32( 183, 254, 183 ), pixel_32( 183, 254, 198 ), pixel_32( 183, 255, 218 ), pixel_32( 183, 254, 234 ), pixel_32( 183, 254, 255 ), pixel_32( 183, 234, 254 ), pixel_32( 183, 218, 254 ), pixel_32( 183, 198, 255 ), pixel_32( 3, 2, 114 ), pixel_32( 30, 2, 115 ), pixel_32( 58, 2, 114 ), pixel_32( 86, 3, 114 ), pixel_32( 114, 2, 114 ), pixel_32( 115, 3, 86 ), pixel_32( 115, 3, 58 ), pixel_32( 115, 3, 30 ), pixel_32( 115, 2, 3 ), pixel_32( 114, 30, 2 ), pixel_32( 114, 58, 3 ), pixel_32( 115, 87, 2 ), pixel_32( 114, 115, 2 ), pixel_32( 87, 115, 3 ), pixel_32( 58, 115, 3 ), pixel_32( 31, 114, 2 ), pixel_32( 2, 115, 2 ), pixel_32( 3, 115, 30 ), pixel_32( 3, 114, 58 ), pixel_32( 3, 115, 87 ), pixel_32( 2, 114, 115 ), pixel_32( 2, 87, 115 ), pixel_32( 3, 59, 114 ), pixel_32( 2, 31, 114 ), pixel_32( 59, 58, 114 ), pixel_32( 71, 59, 115 ), pixel_32( 87, 59, 115 ), pixel_32( 98, 58, 115 ), pixel_32( 114, 58, 115 ), pixel_32( 114, 58, 99 ), pixel_32( 114, 59, 87 ), pixel_32( 114, 59, 71 ), pixel_32( 114, 58, 59 ), pixel_32( 114, 70, 58 ), pixel_32( 114, 87, 58 ), pixel_32( 115, 98, 58 ), pixel_32( 114, 115, 58 ), pixel_32( 98, 114, 58 ), pixel_32( 87, 115, 59 ), pixel_32( 71, 115, 59 ), pixel_32( 58, 115, 58 ), pixel_32( 59, 115, 71 ), pixel_32( 58, 114, 86 ), pixel_32( 59, 115, 98 ), pixel_32( 58, 115, 115 ), pixel_32( 59, 98, 115 ), pixel_32( 58, 86, 115 ), pixel_32( 59, 71, 115 ), pixel_32( 82, 83, 115 ), pixel_32( 90, 82, 115 ), pixel_32( 99, 83, 114 ), pixel_32( 107, 83, 114 ), pixel_32( 115, 83, 115 ), pixel_32( 114, 83, 106 ), pixel_32( 115, 82, 98 ), pixel_32( 115, 83, 90 ), pixel_32( 115, 83, 82 ), pixel_32( 114, 90, 83 ), pixel_32( 114, 98, 82 ), pixel_32( 115, 106, 83 ), pixel_32( 115, 115, 82 ), pixel_32( 107, 114, 82 ), pixel_32( 98, 114, 83 ), pixel_32( 91, 115, 83 ), pixel_32( 83, 115, 82 ), pixel_32( 82, 114, 90 ), pixel_32( 82, 115, 99 ), pixel_32( 83, 115, 106 ), pixel_32( 83, 114, 115 ), pixel_32( 82, 107, 114 ), pixel_32( 83, 99, 114 ), pixel_32( 82, 90, 115 ), pixel_32( 3, 2, 66 ), pixel_32( 19, 2, 67 ), pixel_32( 34, 3, 66 ), pixel_32( 50, 2, 67 ), pixel_32( 67, 3, 66 ), pixel_32( 67, 2, 51 ), pixel_32( 66, 3, 34 ), pixel_32( 67, 3, 19 ), pixel_32( 66, 2, 3 ), pixel_32( 67, 19, 2 ), pixel_32( 67, 34, 2 ), pixel_32( 66, 50, 2 ), pixel_32( 67, 67, 2 ), pixel_32( 51, 66, 3 ), pixel_32( 34, 66, 2 ), pixel_32( 18, 66, 2 ), pixel_32( 2, 67, 3 ), pixel_32( 2, 66, 19 ), pixel_32( 3, 67, 35 ), pixel_32( 3, 66, 50 ), pixel_32( 3, 66, 66 ), pixel_32( 2, 50, 66 ), pixel_32( 2, 35, 66 ), pixel_32( 3, 18, 67 ), pixel_32( 35, 34, 66 ), pixel_32( 42, 34, 66 ), pixel_32( 50, 35, 67 ), pixel_32( 59, 34, 66 ), pixel_32( 67, 35, 66 ), pixel_32( 66, 34, 59 ), pixel_32( 66, 35, 51 ), pixel_32( 66, 35, 42 ), pixel_32( 67, 35, 34 ), pixel_32( 67, 42, 34 ), pixel_32( 66, 50, 35 ), pixel_32( 67, 58, 34 ), pixel_32( 67, 67, 35 ), pixel_32( 58, 67, 34 ), pixel_32( 51, 66, 34 ), pixel_32( 43, 67, 35 ), pixel_32( 34, 67, 35 ), pixel_32( 34, 66, 42 ), pixel_32( 35, 67, 50 ), pixel_32( 35, 66, 58 ), pixel_32( 35, 66, 66 ), pixel_32( 35, 58, 67 ), pixel_32( 35, 51, 66 ), pixel_32( 34, 43, 66 ), pixel_32( 47, 46, 66 ), pixel_32( 50, 46, 67 ), pixel_32( 55, 46, 66 ), pixel_32( 63, 46, 66 ), pixel_32( 66, 46, 66 ), pixel_32( 67, 46, 63 ), pixel_32( 66, 46, 54 ), pixel_32( 66, 46, 51 ), pixel_32( 67, 46, 47 ), pixel_32( 66, 51, 47 ), pixel_32( 66, 55, 46 ), pixel_32( 67, 63, 47 ), pixel_32( 66, 66, 47 ), pixel_32( 62, 66, 46 ), pixel_32( 55, 66, 47 ), pixel_32( 50, 66, 47 ), pixel_32( 47, 67, 46 ), pixel_32( 46, 66, 51 ), pixel_32( 47, 67, 55 ), pixel_32( 46, 66, 62 ), pixel_32( 46, 67, 67 ), pixel_32( 46, 63, 67 ), pixel_32( 46, 55, 66 ), pixel_32( 46, 50, 67 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ), pixel_32( 0, 0, 0 ) }; #endif 

Help would be great, because i tried to fix this for days now. I have already tried to set the Entrypoint to wWinMainCRTStartup but it didnt help.