Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Using Extended MessageBox() Class
Using File Mapping for enumerating files opened by Visual FoxPro
Using the NetMessageBufferSend to send messages on the network
Drawing icons associated with the VFP main window
Enumerating network sessions established on a server
How to display picture stored in enhanced-format metafile (*.emf)
Monitoring changes in a directory
Retrieving the interface–to–IP address mapping table
Scanning the hierarchy of child windows down from the main VFP window
System Image List Viewer
Winsock: changing the byte ordering
Connecting a local device to a network resource
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
GDI+: printing vertical text on VFP reports via generated images (VFP9)
How to Start a Process as Another User (NT/XP/2K)
Transparent Menu Class (requires VFP9)
Using InternetSetFilePointer when resuming interrupted download from the Internet
Using the SetErrorMode for determining if a floppy drive is ready
Using vendor-neutral SQL constructs
Winsock: retrieving the standard host name and IP address for the local machine
Creating a clipping region from the path selected into the device context of a form
Creating a console window for Visual FoxPro application
Displaying animated images on FoxPro form with BitBlt and StretchBlt functions
Displaying printer-properties Property Sheet for the specified printer
How to enumerate terminal servers within the specified Windows domain

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  • How to enumerate sessions and processes on a specified terminal server

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    DO declare
     
    LOCAL cDomainName, hBuffer, nSvrIndex, nSvrCount, nBufsize,;
        cBuffer, nAddress, cSvrName
     
    STORE 0 TO hBuffer, nSvrCount
     
    * The first parameter is the name of Windows domain to be queried.
    * If this parameter is NULL, the current domain is assumed.
    cDomainName=NULL
    *cDomainName="companydomain"
     
    nResult = WTSEnumerateServers(cDomainName, 0, 1, @hBuffer, @nSvrCount)
     
    IF nResult = 0
    * 1212=invalid domain name/format
        ? "WTSEnumerateServers failed with error:", GetLastError()
        RETURN
    ENDIF
     
    ? "Number of terminal servers within the domain:", nSvrCount
     
    * create VFP string variable and allocate amount of space
    * required to store the array of WTS_SERVER_INFO structures
    * created by WTSEnumerateServers function
    nBufsize = GlobalSize(hBuffer)
    cBuffer = REPLICATE(CHR(0), nBufsize)
    = MemToStr(@cBuffer, hBuffer, nBufsize)
     
    *    The array of WTS_SERVER_INFO structures starts with 
    * N DWORD (4-byte) values, where N is the number 
    * of terminal servers detected.
    *    Each value is the address in memory where a terminal server
    * name is stored.
    *    Each terminal server name ends with zero byte.
     
    * retrieve terminal server names from the array
    FOR nSvrIndex=0 TO nSvrCount-1
        nAddress = buf2dword(SUBSTR(cBuffer, nSvrIndex*4+1, 4))
        cSvrName = SUBSTR(cBuffer, nAddress - hBuffer+1)
        cSvrName = SUBSTR(m.cSvrName, 1, AT(CHR(0),cSvrName)-1)
        ? "["+cSvrName+"]"
    NEXT
     
    * release memory implicitly allocated by the WTSEnumerateServers
    = WTSFreeMemory(hBuffer)
    * end of main
     
    PROCEDURE declare
        DECLARE INTEGER GetLastError IN kernel32
        DECLARE WTSFreeMemory IN Wtsapi32 INTEGER pMemory
        DECLARE INTEGER GlobalSize IN kernel32 INTEGER hMem
     
        DECLARE INTEGER WTSEnumerateServers IN Wtsapi32;
            STRING pDomainName, LONG Reserved, LONG RqVersion,;
            LONG @ppServerInfo, LONG @SICount
     
        DECLARE RtlMoveMemory IN kernel32 As MemToStr; 
            STRING @dst, INTEGER src, INTEGER ByteCount
     
    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)
     
     
     

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    2157 bytes  
    Created: 2006-12-29 16:20:17  
    Modified: 2006-12-29 16:33:08  
    Visits in 7 days: 60  
    Listed functions:
    GetLastError
    GlobalSize
    WTSEnumerateServers
    WTSFreeMemory
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