Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Converting a decimal string to an integer
GDI+: Using Scale and Shear transformations
Using Custom FTP class (DEFINE CLASS ftp As Custom)
Using the Semaphore object
GDI+: custom control, base class
GDI+: Storing DLL icon resources in image files
Reading data from INI files
GDI+: converting text strings to images and saving in a graphics file
How to start the screen saver and how to find whether the screen saver is active
Saying "Hello World!" with VFP and WinAPI
Copying files as a transacted operation (Vista)
GDI+: loading image file, drawing on it, saving the result to another file
Closing Windows
Converting characters to upper or lower case
How to fill a buffer with random bytes using Cryptography API Functions
How to play a waveform sound (a WAV file in particular)
Retrieving window and menu help context identifiers
Using the CopyFile
Using Video Capture: enumerating installed capture drivers
Basic Volume information
Converting long file names to the short format and vice versa
List of addresses in the AutoDial mapping database
Obtaining the System and Windows folder names
Open and close a Simple MAPI Session
Validating the heap of the calling process

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
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


User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
1189 bytes  
Created: 2001-12-01 08:43:07  
Modified: 2001-12-01 08:43:41  
Visits in 7 days: 35  
Listed functions:
GetLastError
GetProcessHeap
HeapCompact
HeapValidate
Printer friendly API declarations
Word Index links for this example:
Translate this page:
  Spanish    Portuguese    German    French    Italian  
FreeTranslation.com offers instant, free translations of text or web pages.
User Contributed Notes:
There are no notes on this subject.


Copyright 2001-2016 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 (5.6.30), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.81.65.255)
1.08 min.Example: 'How to empty the Recycle Bin'
Google
Advertise here!