Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Using mailslots to send messages on the network
Using the LoadImage function to have a bitmap file loaded and displayed on VFP main window
Using the SystemParametersInfo function
Comparing dimensions of the VFP main window with _SCREEN properties
Connecting a local device to a network resource
Copying picture of the active form to the Clipboard using Enhanced Metafile API functions
Creating a window using CreateWindowEx function
How to block the ALT+TAB shortcut (WinXP)
How to display a dialog box with which the user can add a data source (DSN)
How to retrieve the number of print jobs queued for the printer
Listing child windows for the Windows desktop
Obtaining MAC address through Address Resolution Protocol (ARP) request
Printing text on the client area of the main VFP window
Reading Internet Query options
Retrieving information specific to the current Time Zone
Saving available locale records into a cursor
Uploading local file to FTP server with FtpPutFile
Using Beep and Sleep functions to make the old tin buzz sing (WinNT only?)
Winsock: retrieving the standard host name and IP address for the local machine
Dragging files from Explorer window and dropping them on FoxPro control (requires VFP9)
How to retrieve the size of a remote file (FTP)
Obtaining names of local and global groups for current user (WinNT/XP/2K)
Obtaining physical parameters for a drive: sectors, clusters, cylinders...
Opening access to the Microsoft Internet functions for the application
Obtaining I/O counts for the current process

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More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
#DEFINE PROCESS_QUERY_INFORMATION 0x0400
#DEFINE PROCESS_VM_READ 4
DO declare

* retrieve a handle to the current process
hProcess = OpenProcess(;
    BITOR(PROCESS_QUERY_INFORMATION,PROCESS_VM_READ),;
    0, GetCurrentProcessId()) && application.ProcessId

IF hProcess = 0
    ? "OpenProcess failed:", GetLastError()
    RETURN
ENDIF

LOCAL cBuffer
cBuffer = REPLICATE(CHR(0), 48)
= GetProcessIoCounters(hProcess, @cBuffer)

? "ReadOperationCount:", buf64ToNum(SUBSTR(cBuffer,1,8))
? "WriteOperationCount:", buf64ToNum(SUBSTR(cBuffer,9,8))
? "OtherOperationCount:", buf64ToNum(SUBSTR(cBuffer,17,8))
? "ReadTransferCount:", buf64ToNum(SUBSTR(cBuffer,25,8))
? "WriteTransferCount:", buf64ToNum(SUBSTR(cBuffer,33,8))
? "OtherTransferCount:", buf64ToNum(SUBSTR(cBuffer,41,8))

= CloseHandle(hProcess)
* end of main

FUNCTION buf64ToNum(cBuffer)
    LOCAL nLo, nHi
    nLo = buf2dword(SUBSTR(cBuffer,1,4))
    nHi = buf2dword(SUBSTR(cBuffer,5,4))
RETURN m.nLo + m.nHi * (0xffffffff+1)

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)

PROCEDURE declare
    DECLARE INTEGER GetLastError IN kernel32
    DECLARE INTEGER GetCurrentProcessId IN kernel32
    DECLARE INTEGER CloseHandle IN kernel32 INTEGER hObject

    DECLARE INTEGER OpenProcess IN kernel32;
        INTEGER dwDesiredAccess,;
        INTEGER bInheritHandle, INTEGER dwProcId

    DECLARE INTEGER GetProcessIoCounters IN kernel32;
        INTEGER hProcess, STRING @lpIoCounters

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1586 bytes  
Created: 2008-03-26 17:14:26  
Modified: 2008-03-26 17:16:36  
Visits in 7 days: 43  
Listed functions:
CloseHandle
GetCurrentProcessId
GetLastError
GetProcessIoCounters
OpenProcess
Printer friendly API declarations
My comment:
The IO_COUNTERS structure contains I/O accounting information for a process or a job object. For a job object, the counters include all operations performed by all processes that have ever been associated with the job, in addition to all processes currently associated with the job.
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