form MSDN:<br>The SetWindowLongPtr function changes an attribute of the specified window. The function also sets a value at the specified offset in the extra window memory. <br><br>This function supersedes the SetWindowLong function. To write code that is compatible with both 32-bit and 64-bit versions of Windows, use SetWindowLongPtr<br><br>這個函數是以後用來代替 SetWindowLong的!<br>在delphi中沒有聲明, 你可自己聲明一個, 或者, 先用 setWindowLong