Using Win32 functions in Visual FoxPro Image Gallery
Memory Management
..msdn
CopyMemory
FillMemory
GetProcessHeap
GetProcessHeaps
GlobalAlloc
GlobalFree
GlobalLock
GlobalMemoryStatus
GlobalReAlloc
GlobalSize
GlobalUnlock
HeapAlloc
HeapCompact
HeapFree
HeapLock
HeapReAlloc
HeapSize
HeapUnlock
HeapValidate
HeapWalk
LocalAlloc
LocalFree
LocalSize
VirtualAllocEx
VirtualFreeEx
ZeroMemory
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Attaching menu to a top-level form
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Enumerating files opened on the network
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How to assemble an array of strings and pass it to external function
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How to display the Print property sheet
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MapiSendMail class for Visual FoxPro application
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Obtaining names of local and global groups for current user (WinNT/XP/2K)
Passing data records between VFP applications via the Clipboard
Printing Image File, programmatically set print page orientation to landscape
Reading and setting explicit Application User Model ID for the current process (Win7)
Reading entries from Event logs
Retrieving configuration information for the specified server (Win2000/XP)
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Shortcut Menu Class
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Storing the environment strings in cursor
URL: splitting into its component parts
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Writing entries to custom Event Log
How to display the Print property sheet

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Before you begin:
The Print property sheet is a standard user interface that enables the user to specify the properties of a particular print job.



The first page of a Print property sheet is the General page. The property sheet can also have additional application-specific and driver-specific property pages following the General page. The lower portion of the General page is a child dialog box template with controls similar to those of the Print Dialog Box.

See also:
  • Printing Image File, programmatically set print page orientation to landscape
  •  
    #DEFINE PRINTDLGEX_LEN 84
    #DEFINE PD_RETURNDC 0x100
    #DEFINE PD_RETURNDEFAULT 0x400
    #DEFINE PD_COLLATE 0x00000010
    #DEFINE START_PAGE_GENERAL 0xffffffff 
     
    DO declare
     
    *!*    typedef struct tagPRINTPAGERANGE {
    *!*        DWORD nFromPage;
    *!*        DWORD nToPage;
    *!*    } PRINTPAGERANGE, *LPPRINTPAGERANGE;
     
    LOCAL oPrintPageRange As PChar, nFlags, cPrintDlgEx
     
    * lpPageRanges must be non-NULL
    * allocating space for 10 PRINTPAGERANGE structures
    oPrintPageRange = CREATEOBJECT("PChar",;
        REPLICATE(CHR(0),80))
     
    nFlags = BITOR(PD_RETURNDC,PD_COLLATE)
     
    * populate PRINTDLGEX structure
    cPrintDlgEx = num2dword(PRINTDLGEX_LEN) +;
        num2dword(_screen.HWnd) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(m.nFlags) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(10) +;
        num2dword(oPrintPageRange.GetAddr()) +;
        num2dword(1) +;
        num2dword(10) +;
        num2dword(5) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(0) +;
        num2dword(START_PAGE_GENERAL) +;
        num2dword(0)
     
    LOCAL nResult, nResultAction, hDC
    nResult = PrintDlgEx(@cPrintDlgEx)
     
    IF nResult = 0
        * the outcome of the dialog: PD_RESULT_APPLY,
        * PD_RESULT_CANCEL or PD_RESULT_PRINT
        nResultAction = buf2dword(SUBSTR(cPrintDlgEx, 81, 4))
     
        * handle to a device context for
        * the selected printer
        hDC = buf2dword(SUBSTR(cPrintDlgEx, 17, 4))
     
        ? nResultAction, hDC
    ELSE
        ? "Error:", TRANSFORM(m.nResult, "@0")
    ENDIF
    * end of main
     
    PROCEDURE declare
        DECLARE INTEGER PrintDlgEx IN comdlg32 STRING @lppd
     
    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 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)
     
    DEFINE CLASS PChar As Custom
        PROTECTED hMem
     
    PROCEDURE Init(lcString)
        THIS.hMem = 0
        THIS.setValue(lcString)
     
    PROCEDURE Destroy
        THIS.ReleaseString
     
    FUNCTION GetAddr  && returns a pointer to the string
    RETURN THIS.hMem
     
    FUNCTION GetValue && returns string value
        LOCAL lnSize, lcBuffer
        lnSize = THIS.getAllocSize()
        lcBuffer = SPACE(lnSize)
     
        IF THIS.hMem <> 0
            DECLARE RtlMoveMemory IN kernel32 As Heap2Str;
                STRING @, INTEGER, INTEGER
            = Heap2Str(@lcBuffer, THIS.hMem, lnSize)
        ENDIF
    RETURN lcBuffer
     
    FUNCTION GetAllocSize  && returns allocated memory size (string length)
        DECLARE INTEGER GlobalSize IN kernel32 INTEGER hMem
    RETURN Iif(THIS.hMem=0, 0, GlobalSize(THIS.hMem))
     
    PROCEDURE SetValue(lcString) && assigns new string value
    #DEFINE GMEM_FIXED 0 
        THIS.ReleaseString
     
        DECLARE INTEGER GlobalAlloc IN kernel32 INTEGER, INTEGER
        DECLARE RtlMoveMemory IN kernel32 As Str2Heap;
            INTEGER, STRING @, INTEGER
     
        LOCAL lnSize
        lcString = lcString + Chr(0)
        lnSize = Len(lcString)
        THIS.hMem = GlobalAlloc(GMEM_FIXED, lnSize)
        IF THIS.hMem <> 0
            = Str2Heap(THIS.hMem, @lcString, lnSize)
        ENDIF
     
    PROCEDURE ReleaseString  && releases allocated memory
        IF THIS.hMem <> 0
            DECLARE INTEGER GlobalFree IN kernel32 INTEGER
            = GlobalFree(THIS.hMem)
            THIS.hMem = 0
        ENDIF
    ENDDEFINE  && pchar
     

    User rating: 9/10 (1 votes)
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    3460 bytes  
    Created: 2007-10-04 15:33:13  
    Modified: 2009-09-24 10:38:40  
    Visits in 7 days: 71  
    Listed functions:
    GlobalAlloc
    GlobalFree
    GlobalSize
    PrintDlgEx
    Printer friendly API declarations
    My comment:
    When populating the PRINTDLGEX structure, note that the hwndOwner member cannot be NULL. It must refer to a valid window. As well the lpPageRanges must point at a valid memory block.
    Word Index links for this example:
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    User Contributed Notes:
    Victor Espinoza | 2007-10-05 12:46:04
    This is great! Thank you for posting this example.
    Victor Espinoza | 2007-10-05 17:53:33
    Thank Anatoly for showing how to use this API function:

    For those how would like to find out the pages selected by the user:

    IF nResultAction = 1
     hPages = buf2dword(SUBSTR(cPrintDlgEx, 41,44))
     lnPtr = GlobalLock (hPages)
     lcBuffer = Repli(Chr(0), 8)
     = Heap2Str(@lcBuffer, lnPtr, 8)
     ? "FromPage = " + TRANS(buf2dword(SUBSTR(lcBuffer,1,4)))
     ? "ToPage = " + TRANS(buf2dword(SUBSTR(lcBuffer,5,4)))
     = GlobalUnlock(hPages)
    ENDIF

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