Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
URL: converting unsafe characters and spaces into escape sequences
Creating a file, then moving it to another destination
Obtaining window class name for the main VFP window
Retrieving IP statistics for the computer
Retrieving list of Global Atom names
Retrieving the name of the network resource associated with a local device
Using the SetErrorMode for determining if a floppy drive is ready
Enumerating network interfaces on the local computer
Finding the application, icon and friendly names associated with a file name
How to fill a buffer with random bytes using Cryptography API Functions
Reading current hardware profile
Setting the Window Region for a form
How to retrieve the number of objects stored in the Recycle Bin
Closing Windows
Converting characters to upper or lower case
Retrieving country-specific dialing information from the Windows Telephony list of countries
Listing device drivers in the system: load addresses, names
Power capabilities of the system: battery, UPS, sleep and hibernation modes, processor throttling
Retrieving statistics for the TCP protocol running on the local computer
Setting and retrieving the double-click time for the mouse
Winsock: initializing the service in the VFP application
Disabling drawing in the VFP form
Programmatically removing submenus from VFP main menu
Reading STARTUPINFO structure for the current VFP session
Validating the heap of the calling process

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DO decl

#DEFINE HEAP_ZERO_MEMORY   8

* MSDN: the HEAP_NO_SERIALIZE value can, be safely used 
* the process has only one thread -- this is how the VFP is
#DEFINE HEAP_NO_SERIALIZE  1

LOCAL hProcHeap, lnFreeSize

* retrieving a handle to the heap of the calling process
hProcHeap = GetProcessHeap()
? "Calling process heap handle:", hProcHeap

* making an attempt to compact the calling process heap
* supported in Windows NT/2000/XP, not in Windows 95/98/Me
lnFreeSize = HeapCompact (hProcHeap, HEAP_NO_SERIALIZE)
IF lnFreeSize = 0
* 120 = This function is not supported on this system.
    ? "Error code:", GetLastError()
ELSE
    ? "The largest committed free block in the heap:",;
            ALLTRIM(TRANS(lnFreeSize, "999,999,999,999,999")), "bytes"
ENDIF

* validating the calling process heap
? "The heap is valid:",;
    Iif(HeapValidate (hProcHeap, HEAP_NO_SERIALIZE, 0)=0, "No","Yes")

PROCEDURE  decl
    DECLARE INTEGER GetLastError IN kernel32
    DECLARE INTEGER GetProcessHeap IN kernel32

    DECLARE INTEGER HeapCompact IN kernel32;
        INTEGER hHeap, INTEGER dwFlags

    DECLARE INTEGER HeapValidate IN kernel32;
        INTEGER hHeap, INTEGER dwFlags, INTEGER lpMem


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1189 bytes  
Created: 2001-12-01 08:43:07  
Modified: 2001-12-01 08:43:41  
Visits in 7 days: 76  
Listed functions:
GetLastError
GetProcessHeap
HeapCompact
HeapValidate
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