Трудности с SendMessage

//Autor Anonim
#include <conio.h>
#include <iostream>
#include <ostream>
#include <Windows.h>
#include <WinUser.h>
#include <clocale>
using namespace std;
 
void main()
{
    setlocale(LC_CTYPE, "Russian");
    HWND Handle;
    void skup(HWND Handle, int x, int y);
 
    cout << "Ogame bot aukcion v 1.0\n";
    Handle=FindWindow(NULL, L"OGame Automizer v0.99.125 (Compatible with OGame 1.2.5/5.2.0) Pre-Final");
    if(Handle)
    {
        while(1)
        {
            cout << "Ok\n";
            skup(Handle, 404, 89 );
            Sleep(5000);
        }
    }
    else
    { 
        cout << "Error\n";
    }
    getch();
}
 
//Функции
void skup(HWND Handle, int x, int y)
{
        SendMessage(Handle, WM_MOUSEMOVE, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONUP, 0, MAKELONG(x,y));
        Sleep(300);
        SendMessage(Handle, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONUP, 0, MAKELONG(x,y));
}

  SendMessage(Handle, WM_MOUSEMOVE, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONUP, 0, MAKELONG(x,y));
        Sleep(300);
        SendMessage(Handle, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(x,y));
        SendMessage(Handle, WM_LBUTTONUP, 0, MAKELONG(x,y));

ShellExecute( Handle,L"open", L"GameCenter@Mail.Ru.exe",0, L"C:\\Users\\Налик\\AppData\\Local\\Mail.Ru\\GameCenter\\",SW_SHOWNORMAL );

  SendMessage(Handle, iReturn = 0, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(x,y));
  SendMessage(Handle, iReturn = 0, WM_LBUTTONUP, 0, MAKELONG(x,y));