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
LocalLock
Brief
Locks a local memory object and returns a pointer to its first byte.
Syntax
LPVOID WINAPI LocalLock( HLOCAL hMem );
Parameters
hMem – Handle to the memory object.
Return Value
Returns a pointer to the beginning of the memory block.
Returns NULL on failure (e.g., handle is invalid or the block has been discarded). Call GetLastError.
Notes
Increments the lock count of the object by one. The heap manager cannot move or discard a locked block.
Every call to LocalLock must be balanced with a call to LocalUnlock.
For fixed objects (LMEM_FIXED), the lock count is always zero and the returned pointer equals the handle.
Example Code
C Binding
LPSTR pData = (LPSTR)LocalLock(hMem); if (pData) { // work with data LocalUnlock(hMem); }
MASM Binding
push hMem call LocalLock mov [p], ax
See also
| Group | Functions |
|---|---|
| Module manager | GETVERSION GETMODULEHANDLE GETMODULEUSAGE GETMODULEFILENAME GETPROCADDRESS MAKEPROCINSTANCE FREEPROCINSTANCE GETINSTANCEDATA CATCH THROW GETCODEHANDLE LOADLIBRARY |
| Global Memory Manager | GlobalAlloc GlobalCompact GlobalDiscard GlobalFree GlobalLock GlobalReAlloc GlobalSize GlobalUnlock GlobalFlags |
| Local Memory Manager | LocalInit LocalAlloc LocalCompact LocalDiscard LocalFree LocalLock LocalFreeze LocalMelt LocalReAlloc LocalSize LocalUnlock LocalHandleDelta LockData UnlockData LocalFlags |
| Task Scheduler | GetCurrentTask Yield SetPriority |
| Resource Manager | AddFontResource RemoveFontResource LoadBitmap LoadCursor LoadIcon LoadMenu LoadString LoadAccelerators FindResource LoadResource AllocResource LockResource FreeResource AccessResource SizeofResource SetResourceHandler |
| String Translation | AnsiUpper AnsiLower AnsiNext AnsiPrev |
| Atom Manager | InitAtomTable AddAtom DeleteAtom FindAtom GetAtomName |
| Windows Initialization File | GetProfileInt GetProfileString WriteProfileString |
| Debugging | FatalExit |
| File I/O | _lopen _lcreat _llseek _lread _lwrite _lclose OpenFile GetTempFileName GetTempDrive |
| Registry | RegOpenKey RegCreateKey RegCloseKey RegDeleteKey RegSetValue RegQueryValue RegEnumKey |