ID Number: Q72459
3.00 3.10
MS-DOS
Summary:
Some flags have been defined in the WINDOWS.H file [distributed with
the Windows Software Development Kit (SDK)] that are designed to be
used instead of common flag combinations for memory allocations.
Included below is an explanation of these flags:
Global Memory Allocations
-------------------------
There are two flags defined for global memory allocation: GHND and
GPTR. Both are to be used for the wFlags parameter of the
GlobalAlloc function.
Flag Definition
---- ----------
GHND (GMEM_MOVEABLE | GMEM_ZEROINIT)
GPTR (GMEM_FIXED | GMEM_ZEROINIT)
Local Memory Allocations
------------------------
Similarly, there are two flags defined for local memory allocation:
LHND and LPTR. Both are to be used for the wFlags parameter of the
LocalAlloc function:
Flag Definition
---- ----------
LHND (LMEM_MOVEABLE | LMEM_ZEROINIT)
LPTR (LMEM_FIXED | LMEM_ZEROINIT)
The LPTR flag returns a pointer that can be used immediately (no need
to call the LocalLock function); whereas with the GPTR flag, the
GlobalLock function still must be used on the handle that is
returned.
For more information on the GlobalAlloc and LocalAlloc functions,
refer to the "Microsoft Windows Software Development Kit Reference
Volume 1".
Additional reference words: 3.00 3.10