CWindow::GetWindowLongPtr

Retrieves information about the specified window, including a value at a specified offset into the extra window memory.

LONG_PTR GetWindowLongPtr(
   int nIndex 
) const throw( );

Заметки

See GetWindowLongPtr in the Windows SDK.

If you are retrieving a pointer or a handle, this function supersedes the CWindow::GetWindowLong method.

Примечание.
Pointers and handles are 32 bits on 32-bit Windows and 64 bits on 64-bit Windows.

To write code that is compatible with both 32-bit and 64-bit versions of Windows, use CWindow::GetWindowLongPtr.

Header: atlwin.h