| GetWindowLongPtr(HandleRef, WindowLongValues) | Retrieves information about the specified window. The function also retrieves the value at a specified offset into the extra window memory. |
| GetWindowLongPtr(IntPtr, WindowLongValues) | Retrieves information about the specified window. The function also retrieves the value at a specified offset into the extra window memory. |
| GetWindowLongPtr(SafeHandle, WindowLongValues) | Retrieves information about the specified window. The function also retrieves the value at a specified offset into the extra window memory. |