The MASM Forum Archive 2004 to 2012

I've got a problem, when I'm running my program first time after system loads, it not work poperly, but if I close it, next running comes w/o problems.
I've found some symptoms - this is my programm second thread :ProgrammThreadProc PROTO :DWORD
ProgrammThreadProc proc uses eax ebx ecx edx esi edi hWnd:DWORD
LOCAL PrgmWaitTime:DWORD
LOCAL TestWaitTime:DWORD
LOCAL ChipCommand:DWORD
LOCAL hMemPMemToBuff:HGLOBAL
LOCAL lpMemPMemToBuff:DWORD
LOCAL hMemBuffToPMem:HGLOBAL
LOCAL lpMemBuffToPMem:DWORD
LOCAL hMemFileToBuff:HGLOBAL
LOCAL lpMemFileToBuff:DWORD
LOCAL hMemTHexFile:HGLOBAL
LOCAL BinSize:DWORD
LOCAL MemAddr:DWORD
LOCAL SubBlock:DWORD
LOCAL lpMemPoint:DWORD
LOCAL lpLastMemPoint:DWORD
LOCAL lpDsplDst:DWORD
LOCAL lpDsplTick:DWORD
LOCAL ErrRet:DWORD
LOCAL CommErrCnt:DWORD
LOCAL Cnt100msTick:DWORD
LOCAL bEditTxtClr:BOOL
invoke GlobalAlloc, GHND, MaxMemSize ; GMEM_MOVEABLE or GMEM_ZEROINIT
mov hMemPMemToBuff, eax
mov lpMemPMemToBuff, NULL
invoke GlobalAlloc, GHND, MaxMemSize ; GMEM_MOVEABLE or GMEM_ZEROINIT
mov hMemBuffToPMem, eax
mov lpMemBuffToPMem, NULL
IFDEF _DEBUG_
invoke GlobalFlags, hMemPMemToBuff
PrintHex eax, "Global flags(hMemPMemToBuff)"
invoke GlobalFlags, hMemBuffToPMem
PrintHex eax, "Global flags(hMemBuffToPMem)"
PrintHex GMEM_DDESHARE
PrintHex GMEM_DISCARDABLE
PrintHex GMEM_DISCARDED
ENDIF
This piece of code produces this in VKDEBUG :
eax = 00004000, Global flags(hMemPMemToBuff) (ProcessData.asm, 34)
eax = 00004000, Global flags(hMemBuffToPMem) (ProcessData.asm, 36)
GMEM_DDESHARE = 00002000 (ProcessData.asm, 37)
GMEM_DISCARDABLE = 00000100 (ProcessData.asm, 38)
GMEM_DISCARDED = 00004000 (ProcessData.asm, 39)System memory is 512MB (working & tested out of OS ). What's going - why allocated memory is discarded ? How can I fix it to able work every run ?
Thread is created in short procedure called from std WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM in WM_CREATE msg.
CreateThreadsObj PROTO :HWND
CreateThreadsObj proc hWnd:HWND
mov  bThreadQuit, FALSE
invoke CreateEvent, NULL, FALSE, FALSE, NULL
mov  hEventProgramm, eax
invoke CreateThread, NULL, NULL, ADDR ProgrammThreadProc, hWnd, NULL, ADDR ThreadIDProgramm
mov  hThreadProgramm, eax
ret
CreateThreadsObj endp

I've got solution - MaxMemSize was initialised after calling procedure creating Thread ;) invoke CreateThreadsObj, hWnd
mov MaxMemSize, 8192 ; 8k So if sbd meet similar problem, should test GlobalAlloc arguments first - allocating zero size memory global means creating discarded, but valid handle, which could be ReAllocate later...