Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
System and Local Time values
Testing serial ports
Using GetBinaryType (WinNT only) to determine the type of an executable file
Drawing standard Windows icons
Enumerating Processes -- WinNT
How to enumerate logon sessions on local computer
Playing WAV files on InteractiveChange
Printing text on the main VFP window
Winsock: how to retrieve the protocol information corresponding to a protocol number
Creating an Open dialog box to specify the drive, directory, and name of a file to open (Shell32 version)
Displaying printer-properties Property Sheet for the specified printer
Displaying Windows shell folders in TreeView control with Visual FoxPro FLL
GDI+: Creating thumbnails to preview images in a directory
Get the power status of your laptop computer
How to obtain Content-Type value for a file type from the System Registry
Obtaining information about all user accounts on a server (WinNT only)
Pocket PC: base class
Reading and setting explicit Application User Model ID for the current process (Win7)
Building a tree of subdirectories for a given path using FindFile functions
Compressing and decompressing files with Windows API Runtime Library routines
Monitoring changes in a directory
Bitmap Class for Visual FoxPro application
Enumerating ports that are available for printing on a specified server
How to display Windows On-Screen Keyboard
How to enumerate terminal servers within the specified Windows domain

User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
Before you begin:
See also:
  • How to enumerate sessions and processes on a specified terminal server

  • 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.
    nResult = WTSEnumerateServers(cDomainName, 0, 1, @hBuffer, @nSvrCount)
    IF nResult = 0
    * 1212=invalid domain name/format
        ? "WTSEnumerateServers failed with error:", GetLastError()
    ? "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+"]"
    * 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)

    User rating: 0/10 (0 votes)
    Rate this code sample:
    • ~
    2157 bytes  
    Created: 2006-12-29 16:20:17  
    Modified: 2006-12-29 16:33:08  
    Visits in 7 days: 56  
    Listed functions:
    Printer friendly API declarations
    Word Index links for this example:
    Translate this page:
      Spanish    Portuguese    German    French    Italian offers instant, free translations of text or web pages.
    User Contributed Notes:
    There are no notes on this subject.

    Copyright 2001-2015 News2News, Inc. Before reproducing or distributing any data from this site please ask for an approval from its owner. Unless otherwise specified, this page is for your personal and non-commercial use. The information on this page is presented AS IS, meaning that you may use it at your own risk. Microsoft Visual FoxPro and Windows are trade marks of Microsoft Corp. All other trademarks are the property of their respective owners. 

    Privacy policy
    Credits: PHP (4.4.9), an HTML-embedded scripting language, MySQL (5.5.44), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
    Last Topics Visited (
    1.15 min.Example: 'Creating the Save dialog box to specify the drive, directory, and name of a file to save'
    4.97 hrs.Function: 'mmioRead'
    Function group: 'Windows Multimedia'
    5.02 hrs.
    Function group: 'Kernel Transaction Manager'
    Advertise here!