Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Retrieving a handle to DLL and address of an exported function in it
Tracking mouse movement to detect when to start dragging
Using Beep and Sleep functions to make the old tin buzz sing (WinNT only?)
Basic Volume information
Copying files as a transacted operation (Vista)
Creating an Open dialog box to specify the drive, directory, and name of a file to open (Shell32 version)
Displaying standard progress dialog box when copying files
Drawing standard Windows icons
URL: splitting into its component parts
Using FtpCommand
How to delete all print jobs for a printer
How to find the application associated with a file name
Reading data from INI files
Starting external program from VFP and waiting for its termination
Winsock: retrieving the host information corresponding to a network address
Creating a window using CreateWindowEx function
GDI+: custom Slider control
How to disable the Windows Clipboard (VFP9)
How to retrieve configuration data for a specified printer stored in the registry (PrinterDriverData key)
How to save registry key including its subkeys and values to a file
MapiSendMail class for Visual FoxPro application
Minimizing all running applications
PocketPC: custom RAPI class for executing routines on remote Windows CE device
Retrieving the priority class for the current process
Verifying a file using the Authenticode policy provider

User rating: 10/10 (1 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
Before you begin:
The following code sample has been developed by John L Veazey.

The WinVerifyTrust performs a trust verification action on a specified object. The function passes the inquiry to a trust provider that supports the action identifier, if one exists.
? WinVerifyTrust( "C:\Windows\System32\mscomct2.ocx" )

FUNCTION WinVerifyTrust
LPARAMETERS cFileName as String
LOCAL pFileName as String, cFileInfo as String,;
    pFileInfo as Integer, cWintrustInfo as String,;
    nResult as Integer

*!* Ensure the file exists.
IF NOT FILE(cFileName) THEN
    RETURN .F.
ENDIF

*!* Structure Sizes
*!*    GUID = 16 = 4 + 2 + 2 + (1 * 8)
*!* http://msdn.microsoft.com/en-us/library/aa373931%28v=VS.85%29.aspx
*!*    WINTRUST_FILE_INFO = 4 + 4(*) + 4 + 4(*)
*!* http://msdn.microsoft.com/en-us/library/aa388206%28v=VS.85%29.aspx
*!*    WINTRUST_DATA = 48 = 4 + 4 + 4 + 4 + 4 + 4 + 4(*) + 4 + 4 + 4(*) + 4 + 4
*!* http://msdn.microsoft.com/en-us/library/aa388205%28v=VS.85%29.aspx

DECLARE LONG WinVerifyTrust IN wintrust;
AS WinVerifyTrustAPI ;
    LONG, STRING, STRING

*!*    LONG WINAPI WinVerifyTrust(
*!*      __in  HWND hWnd,
*!*      __in  GUID *pgActionID,
*!*      __in  LPVOID pWVTData
*!*    );
*!*

DECLARE RtlMoveMemory IN WIN32API AS CopyMemory ;
    LONG, STRING, LONG

*!*    void CopyMemory(
*!*      __in  PVOID Destination,
*!*      __in  const VOID *Source,
*!*      __in  SIZE_T Length
*!*    );
*!*

DECLARE LONG GlobalAlloc IN WIN32API ;
    LONG, LONG

*!*    HGLOBAL WINAPI GlobalAlloc(
*!*      __in  UINT uFlags,
*!*      __in  SIZE_T dwBytes
*!*    );
*!*

DECLARE LONG GlobalFree IN WIN32API ;
    LONG

*!*    HGLOBAL WINAPI GlobalFree(
*!*      __in  HGLOBAL hMem
*!*    );
*!*

#DEFINE GMEM_ZEROINIT                    0x0040
#DEFINE WTD_UI_NONE                        2
#DEFINE WTD_REVOKE_NONE                    0x00000000
#DEFINE WTD_CHOICE_FILE                    1
#DEFINE WTD_STATEACTION_IGNORE            0x00000000
#DEFINE WTD_SAFER_FLAG                    0x00000100
#DEFINE WTD_UICONTEXT_EXECUTE            0

*!* Allocate UNICODE string
pFileName = GlobalAlloc(GMEM_ZEROINIT, ((LEN(cFileName) + 1) * 2))
*!* Copy filename to UNICODE
cFileName = STRCONV(STRCONV(cFileName,1),5)
*!* Copy UNICODE string to memory allocation
CopyMemory(pFileName, cFileName, LEN(cFileName))
*!* Allocate WINTRUST_FILE_INFO structure
pFileInfo = GlobalAlloc(GMEM_ZEROINIT, 16)
*!* Define contents of WINTRUST_FILE_INFO structure
cFileInfo = BINTOC(16, "4SR") + BINTOC(pFileName, "4SR") +;
    REPLICATE(CHR(0),4) + REPLICATE(CHR(0),4)
*!* Copy Struct data to memory allocation
CopyMemory(pFileInfo, cFileInfo, 16)


*!* {00AAC56B-CD44-11d0-8CC2-00C04FC295EE}
WINTRUST_ACTION_GENERIC_VERIFY_V2  =;
    BINTOC(0x00aac56b, "4SR") +;
    LEFT(BINTOC(0xcd44, "4SR"),2) +;
    LEFT(BINTOC(0x11d0, "4SR"),2) +;
    CHR(0x008c) + CHR(0x00c2) + CHR(0x0000) + CHR(0x00c0) +;
    CHR(0x004f) + CHR(0x00c2) + CHR(0x0095) + CHR(0x00ee)

cWintrustInfo =;
    BINTOC(48, "4SR") +;
    REPLICATE(CHR(0),4) +;
    REPLICATE(CHR(0),4) +;
    BINTOC(WTD_UI_NONE, "4SR") +;
    BINTOC(WTD_REVOKE_NONE, "4SR") +;
    BINTOC(WTD_CHOICE_FILE, "4SR") +;
    BINTOC(pFileInfo, "4SR") +;
    BINTOC(WTD_STATEACTION_IGNORE, "4SR") +;
    REPLICATE(CHR(0),4) +;
    REPLICATE(CHR(0),4) +;
    BINTOC(WTD_SAFER_FLAG, "4SR") +;
    BINTOC(WTD_UICONTEXT_EXECUTE, "4SR")

nResult = WinVerifyTrustAPI(0, WINTRUST_ACTION_GENERIC_VERIFY_V2,;
    cWintrustInfo)

GlobalFree(pFileInfo)
GlobalFree(pFileName)

RETURN nResult == 0
ENDFUNC

User rating: 10/10 (1 votes)
Rate this code sample:
  • ~
3133 bytes  
Created: 2010-10-07 08:14:17  
Modified: 2010-10-07 08:24:58  
Visits in 7 days: 101  
Listed functions:
CopyMemory
GlobalAlloc
GlobalFree
WinVerifyTrust
Printer friendly API declarations
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 2001-2017 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 (5.6.36), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.162.44.105)
9 sec.Function: 'SCardListReaderGroups'
19 sec.Function: 'waveInGetErrorText'
Function group: 'Windows Multimedia'
28 sec.Example: 'Exporting DLL icon resources as .ICO files'
39 sec.Example: 'Terminating all running applications from a VFP program'
47 sec.Function: 'ReadProcessMemory'
58 sec.Example: 'How to access a file using not its name but an alias (hard link)'
1.12 min.Function: 'GetDefaultPrinter'
Function group: 'Printing and Print Spooler'
1.28 min.
Function group: 'Data Decompression Library'
1.42 min.Example: 'Enhanced GetFont dialog'
1.6 min.Function: 'StrFromTimeInterval'
Google
Advertise here!