Table of Contents
This is part of Win16 API which allow to create versions of program from one source code to run under OS/2 and Win16. Under OS/2 program can be running under Win-OS/2 if program is Windows NE executable, and with help on Windows Libraries for OS/2, if it is OS/2 NE executable. Here is a WLO to OS/2 API mapping draft
LocalUnlock
Brief
Decrements the lock count of a local memory object.
Syntax
BOOL WINAPI LocalUnlock( HLOCAL hMem );
Parameters
hMem – Handle to the memory object.
Return Value
Returns FALSE (0) if the lock count becomes zero (object is now unlocked).
Returns TRUE (non‑zero) if the lock count is still greater than zero after decrementing.
Notes
The return value indicates the new lock state, not success or failure – the function always succeeds for a valid handle.
Unlocking allows the heap manager to move or discard the block during compaction.
Example Code
C Binding
BOOL stillLocked = LocalUnlock(hMem);
MASM Binding
push hMem call LocalUnlock test ax, ax ; zero if completely unlocked