Using Win32 functions in Visual FoxPro Image Gallery
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Pocket PC: base class

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Before you begin:
This class is used as a base class for several custom RAPI classes created to access objects stored on Pocket PC:

  • System Registry
  • Object Store Databases
  • Files and folders
  • Executing routines

    See also:
  • FoxPro Advisor article: Access a Pocket PC from Visual FoxPro
  • FoxPro Advisor article: Access a Palm OS PDA from Visual FoxPro
  • ****************************************************
    * Pocket PC: base RAPI class
    ****************************************************
    DEFINE CLASS Trapi As Custom
    #DEFINE RAPIINIT_SIZE  12
    #DEFINE WAIT_OBJECT_0  0
        majorver=0
        minorver=0
        buildno=0
        aclinestatus=0
        batteryflag=0
        batterylifepercent=0
        storesize=0
        freesize=0
        phmemtotal=0
        phmemavail=0
        cputype=0
        cpulevel=0
        cpurevision=0
        connected=.F.
    
    PROCEDURE Init
        THIS.decl
        THIS.InitRapi
    
    PROCEDURE InitRapi
        THIS.UninitRapi
    
        LOCAL cBuffer, hEvent
        cBuffer = PADR(CHR(RAPIINIT_SIZE), RAPIINIT_SIZE, CHR(0))
    
        = CeRapiInitEx(@cBuffer)
        hEvent = buf2dword(SUBSTR(cBuffer,5,4))
    
        IF WaitForSingleObject(hEvent,2000) = WAIT_OBJECT_0
            THIS.connected = .T.
        ELSE
            THIS.UninitRapi
        ENDIF
    RETURN THIS.connected
    
    PROCEDURE UninitRapi
        = CeRapiUninit()
        THIS.connected = .F.
    
    PROCEDURE Destroy
        THIS.UninitRapi
    
    PROCEDURE GetSysInfo
        THIS.GetVersion
        THIS.GetPowerStatus
        THIS.GetStoreSize
        THIS.GetGlobalMemoryStatus
        THIS.GetCPUInfo
    
    PROCEDURE GetVersion
    #DEFINE CEOSVERSIONINFO_SIZE 276
        LOCAL cBuffer, hBuffer
        cBuffer = PADR(num2dword(CEOSVERSIONINFO_SIZE),;
            CEOSVERSIONINFO_SIZE, Chr(0))
        = CeGetVersionEx(@cBuffer)
        THIS.majorver = buf2dword(SUBSTR(cBuffer, 5,4))
        THIS.minorver = buf2dword(SUBSTR(cBuffer, 9,4))
        THIS.buildno = buf2dword(SUBSTR(cBuffer, 13,4))
    
    FUNCTION GetSpecialFolderPath(nFolder)
        LOCAL nBufsize, cBuffer
        nBufsize = 250
        cBuffer = REPLICATE(CHR(0), nBufsize*2)
        nBufsize = CeGetSpecialFolderPath(nFolder, nBufsize, @cBuffer)
    RETURN STRCONV(SUBSTR(cBuffer,1,nBufsize*2),6)
    
    PROCEDURE GetPowerStatus
    #DEFINE SYSTEM_POWER_STATUS 24
        LOCAL cBuffer
        cBuffer = REPLICATE(CHR(0), SYSTEM_POWER_STATUS)
        = CeGetSystemPowerStatusEx(@cBuffer, 0)
        THIS.aclinestatus = ASC(SUBSTR(cBuffer,1,1))
        THIS.batteryflag = ASC(SUBSTR(cBuffer,2,1))
        THIS.batterylifepercent = ASC(SUBSTR(cBuffer,3,1))
    
    PROCEDURE GetStoreSize
    #DEFINE STORE_INFORMATION_SIZE 8
        LOCAL cBuffer
        cBuffer = Repli(Chr(0), STORE_INFORMATION_SIZE)
        = CeGetStoreInformation(@cBuffer)
        THIS.storesize = buf2dword(SUBSTR(cBuffer, 1,4))
        THIS.freesize = buf2dword(SUBSTR(cBuffer, 5,4))
    
    PROCEDURE GetGlobalMemoryStatus
    #DEFINE MEMORYSTATUS_SIZE 32
        LOCAL cBuffer
        cBuffer = PADR(CHR(MEMORYSTATUS_SIZE), MEMORYSTATUS_SIZE, CHR(0))
        = CeGlobalMemoryStatus(@cBuffer)
        THIS.phmemtotal = buf2dword(SUBSTR(cBuffer, 9,4))
        THIS.phmemavail = buf2dword(SUBSTR(cBuffer, 13,4))
    
    PROCEDURE GetCPUInfo
    #DEFINE SYSTEM_INFO_SIZE 36
        LOCAL cBuffer
        cBuffer = PADR(CHR(SYSTEM_INFO_SIZE), SYSTEM_INFO_SIZE, CHR(0))
        = CeGetSystemInfo(@cBuffer)
        THIS.cputype = buf2dword(SUBSTR(cBuffer, 25,4))
        THIS.cpulevel = buf2word(SUBSTR(cBuffer, 33,2))
        THIS.cpurevision = buf2word(SUBSTR(cBuffer, 35,2))
    
    PROTECTED PROCEDURE decl
        DECLARE INTEGER LocalFree IN kernel32 INTEGER hMem
        DECLARE INTEGER CeRapiUninit IN rapi
        DECLARE INTEGER CeGetLastError IN rapi
        DECLARE INTEGER CeRapiInitEx IN rapi STRING @pRapiInit
        DECLARE INTEGER CeCloseHandle IN rapi INTEGER hObject
        DECLARE INTEGER CeGetVersionEx IN rapi STRING @lpVersionInfo
        DECLARE INTEGER CeGetStoreInformation IN rapi STRING @lpsi
        DECLARE CeGlobalMemoryStatus IN rapi STRING @lpmst
        DECLARE CeGetSystemInfo IN rapi STRING @lpSystemInfo
    
        DECLARE INTEGER CeGetSystemPowerStatusEx IN rapi;
            STRING @pstatus, INTEGER fUpdate
    
        DECLARE INTEGER CeGetSpecialFolderPath IN rapi;
            INTEGER nFolder, INTEGER nBufferLength, STRING @lpBuffer
    
        DECLARE INTEGER LocalAlloc IN kernel32;
            INTEGER uFlags, INTEGER uBytes
    
        DECLARE RtlMoveMemory IN kernel32 As StrToMem;
            INTEGER Dest, STRING @Src, INTEGER nLength
    
        DECLARE RtlMoveMemory IN kernel32 As MemToStr;
            STRING @dest, INTEGER src, INTEGER nLength
    
        DECLARE INTEGER WaitForSingleObject IN kernel32;
            INTEGER hHandle, INTEGER dwMilliseconds
    ENDDEFINE
    
    *************************** static members ***************************
    FUNCTION buf2dword(lcBuffer)
    RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
        BitLShift(Asc(SUBSTR(lcBuffer, 2,1)),  8) +;
        BitLShift(Asc(SUBSTR(lcBuffer, 3,1)), 16) +;
        BitLShift(Asc(SUBSTR(lcBuffer, 4,1)), 24)
    
    FUNCTION buf2word(lcBuffer)
    RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
           Asc(SUBSTR(lcBuffer, 2,1)) * 256
    
    FUNCTION num2dword(lnValue)
    #DEFINE m0  256
    #DEFINE m1  65536
    #DEFINE m2  16777216
        IF lnValue < 0
            lnValue = 0x100000000 + lnValue
        ENDIF
        LOCAL b0, b1, b2, b3
        b3 = Int(lnValue/m2)
        b2 = Int((lnValue - b3*m2)/m1)
        b1 = Int((lnValue - b3*m2 - b2*m1)/m0)
        b0 = Mod(lnValue, m0)
    RETURN Chr(b0)+Chr(b1)+Chr(b2)+Chr(b3)
    
    FUNCTION num2word(lnValue)
    RETURN Chr(MOD(m.lnValue,256)) + CHR(INT(m.lnValue/256))
    
    FUNCTION ToUnicode(cStr)
    RETURN STRCONV(m.cStr+CHR(0), 5)
    
    FUNCTION FromUnicode(cStr)
    RETURN STRCONV(m.cStr, 6)
    
    
    

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    4838 bytes  
    Created: 2004-06-20 14:23:24  
    Modified: 2011-12-10 09:20:22  
    Visits in 7 days: 53  
    Listed functions:
    CeCloseHandle
    CeGetLastError
    CeGetSpecialFolderPath
    CeGetStoreInformation
    CeGetSystemInfo
    CeGetSystemPowerStatusEx
    CeGetVersionEx
    CeGlobalMemoryStatus
    CeRapiInitEx
    CeRapiUninit
    LocalAlloc
    LocalFree
    WaitForSingleObject
    Printer friendly API declarations
    My comment:


    #kwd: sln_pocketpc.
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