Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Converting characters in a URL into corresponding escape sequences and backwards
Retrieving configuration information for the specified server (Win98/Me)
Retrieving IP statistics for the computer
Obtaining provider name for a specific type of network
Retrieving various system metrics
Simple MAPI: how to resolve a name to unique address list entry
Winsock: initializing the service in the VFP application
GDI+: custom control, base class
Retrieving country-specific dialing information from the Windows Telephony list of countries
Finding the application, icon and friendly names associated with a file name
Retrieving list of supported paper names (for example, Letter or Legal) for a given printer
Setting the Window Region for a form
Time in milliseconds represented as string (e.g. 1 hour 24 min 36 sec)
CryptoAPI: retrieving list of providers
Pocket PC: creating backup for the System Registry
Reading keys in the specified section of the Win.ini file
Closing Windows
Using the IsWindowEnabled function
Displaying the color palette stored in an image file
Extended OS Version info
Pocket PC: retrieving data from the Contacts Database
Retrieving the name and type of all available RAS-capable devices
URL: converting unsafe characters and spaces into escape sequences
Creating a file, then moving it to another destination
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: 79  
Listed functions:
GetLastError
GetProcessHeap
HeapCompact
HeapValidate
Printer friendly API declarations
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