Hello,
here's the reference: http://msdn.microsoft.com/en-us/library/ms633591(VS.85).aspx
Kind and Best Regards
Lars
SetWindowLongPtr is a macro wrapper. If you check winuser.h :
#define SetWindowLongPtrA SetWindowLongA
#define SetWindowLongPtrW SetWindowLongW
You should use the SetWindowLong function.
Hi, ok, so SetWindowLong is already the new API?
I don't absolutely need it. I just read on msdn SetWindowLong is not thaat compatible with 64-bit Windows (even in 32-bit code).
WINUSERAPI
LONG
WINAPI
SetWindowLongA(
IN HWND hWnd,
IN int nIndex,
IN LONG dwNewLong);
WINUSERAPI
LONG_PTR
WINAPI
SetWindowLongPtrA(
HWND hWnd,
int nIndex,
LONG_PTR dwNewLong);
AFAIK the difference is in the compiler's handling of LONG_PTR.
http://msdn.microsoft.com/en-us/library/ms810720.aspx#midl64b_issues
Quote
INT_PTR, LONG_PTR
Each of these is a polymorphic integral type that has a different size on 32-bit and 64-bit Windows NT® platforms to guarantee that a pointer value can be stored in it. The data types are defined in the public file, basetsd.h. Each has a size of 4 bytes on 32-bit systems and 8 bytes on 64-bit systems. On 32-bit platforms, INT_PTR maps to int and LONG_PTR maps to long. On 64-bit platforms, both the types map to __int64.