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Microsoft: FoxPro FAQ

Memory Management

How to speed-up your VFP Application? by agit72
Posted: 27 Apr 03 (Edited 27 Apr 03)

Here is a procedure to speed-up your VFP Application (tested on VFP6, though):

* Save this File to SetMemory.PRG
* Add 2 (two) lines in you main program:
* 1.  Set Procedure to SetMemory.PRG additive &&(if you have more than one Procedure File)
* 2.  =SetMemory()

LOCAL lnAvailableMem, lpMemoryStatus, lnPct

* Running on the desktop
* Agit72 : agit72@plasa.com, admin@msp-works.com
DECLARE GlobalMemoryStatus IN Win32API STRING @lpMemoryStatus
lpMemoryStatus = REPLICATE(CHR(0), 32)

lnAvailableMem = CharToBin(SUBSTR(lpMemoryStatus, 13, 4))

*** EGL: - Added the fine tuning option
lnPct = 1
IF TYPE("goApp.nSetMemoryPct") == "N"
    lnPct = goApp.nSetMemoryPct
lnAvailableMem = (lnAvailableMem * lnPct)

SYS(3050, 1, lnAvailableMem)
SYS(3050, 2, (lnAvailableMem/2) )

RETURN lnAvailableMem

FUNCTION CharToBin (tcWord)
    LOCAL lnChar, lnWord
    lnWord = 0
    FOR lnChar = 1 TO LEN(tcWord)
        lnWord = lnWord + (ASC(SUBSTR(tcWord, lnChar, 1)) * (2 ^ (8 * (lnChar - 1))))

    RETURN lnWord

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