我如何在32位平台上使用GetWindowLongPtr和SetWindowLongPtr？

我建议您以Windows窗体内部执行的方式处理此问题：

public static IntPtr GetWindowLong(HandleRef hWnd, int nIndex){    if (IntPtr.Size == 4)    {        return GetWindowLong32(hWnd, nIndex);    }    return GetWindowLongPtr64(hWnd, nIndex);}[Dllimport("user32.dll", EntryPoint="GetWindowLong", CharSet=CharSet.Auto)]private static extern IntPtr GetWindowLong32(HandleRef hWnd, int nIndex);[Dllimport("user32.dll", EntryPoint="GetWindowLongPtr", CharSet=CharSet.Auto)]private static extern IntPtr GetWindowLongPtr64(HandleRef hWnd, int nIndex);