Win GUI Problem (C++)

LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main

Debug/Zpad.exe : fatal error LNK1120: 1 unresolved externals

#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT("ZPad");
	HWND		hWnd;
	MSG			Msg;
	WNDCLASS	wndClass;

	wndClass.style			= CS_HREDRAW | CS_VREDRAW;
	wndClass.lpfnWndProc	= WndProc;
	wndClass.cbClsExtra		= 0;
	wndClass.cbWndExtra		= 0;
	wndClass.hInstance		= hInstance;
	wndClass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
	wndClass.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wndClass.hbrBackground	= (HBRUSH)GetStockObject (WHITE_BRUSH);
	wndClass.lpszMenuName	= NULL;
	wndClass.lpszClassName	= szAppName;

	if(!RegisterClass (&wndClass))
	{
		MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR);

		return 0;
	}

	hWnd = CreateWindow(szAppName,
						TEXT("ZPad"),
						WS_OVERLAPPED,
						CW_USEDEFAULT,
						CW_USEDEFAULT,
						CW_USEDEFAULT,
						CW_USEDEFAULT,
						NULL,
						NULL,
						hInstance,
						NULL);

	ShowWindow(hWnd, iCmdShow);
	UpdateWindow(hWnd);

	while(GetMessage(&Msg, NULL, 0,0))
	{
		TranslateMessage(&Msg);
		DispatchMessage(&Msg);
	}
	return Msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
	HDC			hdc;
	PAINTSTRUCT ps;
	RECT		rect;

	switch(Message)
	{
	case WM_CREATE:
		MessageBox(hWnd, TEXT("Welcome to ZPad!"), TEXT("ZPad 2005"), MB_OK);

		return 0;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		GetClientRect(hWnd, &rect);

		DrawText(hdc, TEXT("ZPad, Just displat message!"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
		EndPaint(hWnd, &ps);

		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		
		return 0;
	}
	return DefWindowProc(hWnd, Message, wParam, lParam);
}