Defines a type large enough to hold a DWORD or pointer value.

typedef DWORD_PTR SFTTREE_DWORD_PTR;

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SFTTREE_DWORD_PTR defines a type large enough to hold a DWORD or pointer value.

On Intel 32-bit platforms (IX86), a DWORD and pointer value have the same size (4 bytes).  The SFTTREE_DWORD_PTR type was introduced to support 64-bit platforms, where a DWORD and a pointer do not have the same size.

In earlier releases of SftTree/DLL, certain fields were defined using the generic type DWORD.  These have been replaced with SFTTREE_DWORD_PTR, where a pointer or DWORD value needs to be saved.

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