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Changes an attribute of the specified window, and also sets a value at the specified offset in the extra window memory.
LONG_PTR SetWindowLongPtr(
int nIndex,
LONG_PTR dwNewLong
) throw( );
Remarks
See SetWindowLongPtr in the Windows SDK.
This function supersedes the CWindow::SetWindowLong method. To write code that is compatible with both 32-bit and 64-bit versions of Windows, use CWindow::SetWindowLongPtr.
Requirements
Header: atlwin.h