CWindow::GetWindowLong
Retrieves a 32-bit value at a specified offset into the extra window memory.
LONG GetWindowLong(
int nIndex
) const throw();
Remarks
See GetWindowLong in the Windows SDK.
Note
To write code that is compatible with both 32-bit and 64-bit versions of Windows, use CWindow::GetWindowLongPtr.
Requirements
Header: atlwin.h