How to resolve the follwing problem in c++ under windows

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C++

VisualC++

#include "stdafx.h"
 #define WINVER 0x0500
#include <stdio.h>

#include <windows.h>
#include <conio.h>

int main(int argc, char* argv[])
{
    DEVMODE  dev;
     DWORD           DispNum = 0;
    DISPLAY_DEVICE  DisplayDevice;
    ZeroMemory(&DisplayDevice,sizeof(DisplayDevice));
EnumDisplayDevices(NULL, DispNum, &DisplayDevice, 0);

    return 0;
}

this is my coding ..

first it gives error in EnumDisplayDevices is undeclared ..
Then i included #define WINVER 0x0500.
the problem is solved.. But now it gives some other compilie time errors..

Error:

Compiling...
disp.cpp
NOTE: WINVER has been defined as 0x0500 or greater which enables
Windows NT 5.0 and Windows 98 features. When these headers were released,
Windows NT 5.0 beta 1 and Windows 98 beta 2.1 were the current versions.
For this release when WINVER is defined as 0x0500 or greater, you can only
build beta or test applications.  To build a retail application,
set WINVER to 0x0400 or visit http://www.microsoft.com/msdn/sdk
to see if retail Windows NT 5.0 or Windows 98 headers are available.
See the SDK release notes for more information.
D:\Users\Dharmaraj\pratice\disp\disp.cpp(13) : warning C4101: 'dev' : unreferenced local variable
Linking...
disp.obj : error LNK2001: unresolved external symbol __imp__EnumDisplayDevicesA@16
Debug/disp.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

my self i increase the #define WINVER 0x0600 like that.. then also same error..

how to solve this one..

senior please help me..