Cod ghosts source codes

*(DWORD*)0x1234567=12345;

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

int main()
{
   HWND hWnd = FindWindow(0, "Window"); 
  if(hWnd == NULL)
    { 
        MessageBox(NULL, "Error!", "Error!",NULL); 
    }
else
    {
        DWORD proc_id; 
        GetWindowThreadProcessId(hWnd, &proc_id); 
        if(!hProcess)
        { 
            MessageBox(NULL, "Cannot open process!", "Error!", NULL); 
        }
        else
        {
            //int smth = 1;
            //DWORD size = sizeof(smth); 
            WriteProcessMemory(hProcess, (LPVOID)0x12345678, 234, 4, NULL)); 
            CloseHandle(hProcess); 
         }
}