getting Strange error in WINAPI during linking - c

Question

this is the error I am getting during linking:
main.obj : error LNK2001: unresolved external symbol "long __stdcall windowProcess(struct HWND__ *,unsigned int,unsigned int,long)" (?windowProcess##YGJPAUHWND__##IIJ#Z)
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/main.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.
main.exe - 3 error(s), 0 warning(s)
here is my source code
#include <windows.h>
//#include <stdlib.h>
//#include <string.h>
#include "stdafx.h"
//1. Declaring windowProcess of type LRESULT
//2. WIN API
//3. WIndow Class
//4. Register Class
//5. Create Window
//6. Show Window
// The main window class name
const char myClassName[] = "myClass";
//1. Moving towards 1st step & showing the ass of Window Process
LRESULT CALLBACK windowProcess(HWND,UINT,WPARAM,LPARAM);
//2. Using win api
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevIntance,
LPSTR lpcmdLine,
int comandNumber){
WNDCLASS wc;
wc.style=CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc=windowProcess;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hInstance=hInstance;
wc.hIcon=LoadIcon(hInstance,MAKEINTRESOURCE(IDI_APPLICATION));
wc.hbrBackground=NULL;
wc.lpszMenuName=NULL;
wc.lpszClassName=myClassName;
//3. Registering Wnd Class
if(!RegisterClass(&wc))
{
MessageBox(NULL,"Class didnot get registered","An Simple Window Application",NULL);
}
//hint=hInstance;
//4. registering window class
HWND hWnd=CreateWindow(myClassName,"Title f Window",WS_OVERLAPPEDWINDOW,0,0,500,100,NULL,NULL,hInstance,NULL);
if(!hWnd)
{
MessageBox(NULL,"window didnt created","An Simple Windw Application",NULL);
}
//5. Now after window has been created lets show this window
ShowWindow(hWnd,comandNumber);
UpdateWindow(hWnd);
return 1;
}//winapi WinMain function ends

Answer 1

The error tells you that the function
LRESULT CALLBACK windowProcess(HWND,UINT,WPARAM,LPARAM);
is only declared and defined nowhere.

Answer 2

Check Project props -> Linker -> System -> SubSystem.