Windows Programming

[Hazique35]

I only have one error in my code and I dont know why it is wrong!
(I have not run the code, but the part that is underlined in red sais:
A value of type "long" cannot be used to initialize an entitity of type "HWND")
All i am trying to do is create a window.

Here is the part with the error. Its where I create a window.

HWND WINAPI CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,
        "The title of my window",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
        NULL, NULL, hInstance, NULL);


    if(hwnd == NULL)
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }


    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

How do I fix this?