Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Creating a file, then moving it to another destination
Current directory of the application
GDI+: Color Transparency
Converting long file names to the short format and vice versa
GDI+: Storing DLL icon resources in image files
Using Shell for performing operations on files
GDI+: converting image file to another graphics format
How to obtain the number of rows affected by remote UPDATE, INSERT or DELETE statement
How to perform Base64 encoding/decoding using Cryptography API Functions
PocketPC: creating directories and files
Using Multimedia Command Strings to play MIDI files
Using the Semaphore object
Searching for the specified file using the SearchPath
Who owns the Windows Clipboard
Controlling master audio volume by sending WM_APPCOMMAND messages
GDI+: converting text strings to images and saving in a graphics file
Setting and retrieving the double-click time for the mouse
How to get the path to a Special Folder
GetFileOwner - Get the owner of an NTFS file
Accessing a CD device (cdaudio) with Multimedia Command Strings
Converting characters to upper or lower case
GDI+: loading image file, drawing on it, saving the result to another file
How to create a service object
How to check whether the system is 32-bit or 64-bit
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: 193  
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 2001-2014 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 (5.1.68), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.204.134.183)
5 sec.
Function group: 'Process and Thread'
3 day(s)Example: 'Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera'
Google
Advertise here!