Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Starting external program from VFP and waiting for its termination
Adding printer to the list of supported printers for the specified server
Converting Unicode data from the Clipboard to a character string using a given code page
Enumerating MIDI output devices
GDI+: Scrolling through large image using the mouse
How to download this reference`s archive through WinInet functions using InternetOpenUrl
How to retrieve version information for the specified file
How to run FoxPro application under different user name (impersonating user)
How to save registry key including its subkeys and values to a file
MapiSendMail class for Visual FoxPro application
Obtaining the bounding rectangle for the specified device context
PocketPC: custom RAPI class for executing routines on remote Windows CE device
Semi-transparent Form
Using GetBinaryType (WinNT only) to determine the type of an executable file
Winsock: changing the byte ordering
Accessing examples contained in this reference through Web Services
Enumerating servers of the specified type (e.g. SQL Server) in the primary domain
How to assemble an array of strings and pass it to external function
How to obtain Content-Type value for a file type from the System Registry
How to read email messages using Simple MAPI
Obtaining heap handles and enumerating memory blocks for the current VFP session (WinNT only)
Obtaining OS memory performance information
Retrieving information about the specified icon
Retrieving the User Datagram Protocol (UDP) listener table
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: 62  
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 2001-2016 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 (5.5.46), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.221.165.157)
21 sec.Function: 'CryptEnumProviders'
Function group: 'Cryptography Reference'
1.07 min.Gallery
Page 3
5.79 hrs.Example: 'Storing screen shot of a form to bitmap file'
4 day(s)Example: 'Retrieving the names of all sections in an initialization file'
Google
Advertise here!