Using Win32 functions in Visual FoxPro Image Gallery
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Memory Management
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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
Code examples:
Accessing LSA Policy object (Local Security Authority)
Adding and deleting Scheduled Tasks using NetScheduleJob API functions
Adding and deleting User Accounts
Adding printer to the list of supported printers for the specified server
Adding user-defined items to the Control Menu of VFP form (requires VFP9)
Attaching menu to a top-level form
Browsing Windows Known Folders (Special Folders)
Compressing and decompressing files with Windows API Runtime Library routines
Converting command-line string to a set of Unicode argument strings (WinNT only)
Creating the Open dialog box to specify the drive, directory, and name of a file to open
Creating the Save dialog box to specify the drive, directory, and name of a file to save
Custom HttpRequest class (WinHTTP)
Deleting files into the Recycle Bin
Displaying dimmed window behind VFP top-level form
Displaying standard progress dialog box when copying files
Displaying system dialog that selects a folder
Dynamic strings implemented through VFP Custom class
Enumerating data formats currently available on the clipboard
Enumerating files opened on the network
Extensible Storage Engine class library
How to assemble an array of strings and pass it to external function
How to display a user-defined icon in the MessageBox dialog
How to display advanced Task Dialog (Vista)
How to display the Print property sheet
How to display the Properties dialog box for a file (ShellExecuteEx)
How to enumerate sessions and processes on a specified terminal server
How to enumerate terminal servers within the specified Windows domain
How to enumerate, add and delete shares on the local computer (WinNT/XP)
How to extract frames from AVI files
How to ping a remote site using ICMP API calls
How to prevent users from accessing the Windows Desktop and from switching to other applications
How to remove a directory that is not empty
How to write and read Window Properties for the specified window
Loading a string resource from an executable file
MapiSendMail class for Visual FoxPro application
Mapping and disconnecting network drives
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)
Retrieving the command line for the VFP session
Sending email messages with Simple MAPI
Shortcut Menu Class
Starting a dialog box for connecting to network resources and passing input parameters
Storing the environment strings in cursor
URL: splitting into its component parts
Using Change Notification Objects to monitor changes to the printer or print server
Using WM_COPYDATA for interprocess communication (VFP9)
Windows Shell Icons displayed and exported to ICO files (Vista)
Winsock: connecting to a news server (NNTP, port 119)
Writing entries to custom Event Log
How to ping a remote site using ICMP API calls

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Before you begin:
The Ping class presents several API functions -- IcmpCreateFile, IcmpCloseHandle, IcmpSendEcho and others -- that used to send an ICMP Echo request and get a reply (RTT, round-trip time).

This is interesting, the same set of ICMP functions may exist in two libraries, ICMP.DLL and IPHLPAPI.DLL, on WinXP/2K computer.

See also:
  • How to ping a remote site using IP Helper API calls
  • How to retrieve adapter information for the local computer (including MAC address)
  • Obtaining addresses for the adapters on the local computer (Win XP/2003/Vista)
  • Using NetWkstaTransportEnum to obtain MAC Address of remote server

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    		4122 bytes  
    Created: 2005-04-12 11:53:00  
    Modified: 2011-12-10 09:20:22  
    Visits in 7 days: 191  
    Listed functions:
    gethostbyname
    GlobalSize
    IcmpCloseHandle
    IcmpCreateFile
    IcmpSendEcho
    inet_ntoa
    WSACleanup
    WSAStartup
    		Printer friendly API declarations
    My comment:
    The ICMP, Internet Control Message Protocol, an extension to the Internet Protocol that is generally used by PING utilities. This protocol is handy for generation of error messages, test packets, and informational messages related to IP.

    It is different from TCP and UDP protocols by both the purpose and implementation. RFC792 defines the ICMP.
    Word Index links for this example:
    local computer
    extension
    remote server
    error message
    IP Helper
    ping a remote site
    MAC address
    packet
    round-trip time
    ICMP Echo Request
    Internet Control Message Protocol
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    User Contributed Notes:
    JimW | 2010-12-13 15:59:56
    I think there is a small error in the ToString() method.

    For the first line of the method, rather than:

    IF .errorcode=0

    I think it should be:

    IF this.errorcode=0
    Log in to post a comment

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