inline

stock SomeFunction(playerid)
{
    // Named callback.
    ShowPlayerDialogCallback(playerid, 42, 2, DIALOG_STYLE_INPUT, "Login", "Enter your password below:", "Login", "Cancel", "MyCallback");
    // Annonymous local callback.
    ShowPlayerDialogCallback(playerid, 42, 2, DIALOG_STYLE_INPUT, "Login", "Enter your password below:", "Login", "Cancel", using inline);
    inline(playerid, dialogid, response, listitem, inputtext[])
    {
        // Who cares.
    }
}

public MyCallback(playerid, dialogid, response, listitem, inputtext[])
{
    // Who cares.
}