Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Reading entries from Event logs
Setting properties of the window: caption and user-defined value
System Image List Viewer
The DetectAutoProxyUrl function identifies the auto-config script location
Using Path functions from Shell Lightweight Utility APIs (shlapi.dll)
Winsock: resolving an address to a host name
An alternative way of setting Form.Closable to False
Clipping mouse cursor area
Connecting a local device to a network resource
Displaying all TCP connections for the local system
Drawing a rectangle using Windows regular edges and borders
GDI+: retrieving list of available image encoders and image decoders
GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
How to display advanced Task Dialog (Vista)
Quering a waveform-audio input device
Quering Audio Mixer Device
Retrieveing information about the active window (even if it is not owned by the calling process)
Retrieving the interface–to–IP address mapping table
Saving available locale records into a cursor
Using the RestartDialog function -- restarting Windows
Using the Semaphore object to allow only one instance of VFP application running
Winsock: retrieving the standard host name and IP address for the local machine
Adding printer to the list of supported printers for the specified server
Controlling master audio volume by sending WM_APPCOMMAND messages
How to display Windows On-Screen Keyboard

User rating: 7.5/10 (4 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
Versions:
click to open
Before you begin:

For data entry, instead of relying on the physical keyboard, user may choose to use Windows On-Screen Keyboard that gives access to all standard keys.

On-Screen Keyboard executable file, osk.exe, resides in System32 directory. Note that on 64-bit systems this file cannot be launched from 32-bit process. "File System Redirector" article on MSDN explains why:
32-bit applications can access the native system directory by substituting %windir%\Sysnative for %windir%\System32. WOW64 recognizes Sysnative as a special alias used to indicate that the file system should not redirect the access.
 
#DEFINE MAX_PATH 260
#DEFINE OSK_EXE "osk.exe"
 
DO declare
= ShellExecute(0, "open", GetOskPath(), "", "", 1)
* end of main
 
FUNCTION GetOskPath() As String
    LOCAL cPath
 
    cPath = PathCombine(;
        GETENV("windir"),;
        "sysnative",;
        OSK_EXE )
 
    IF FILE(cPath)
        RETURN m.cPath
    ENDIF
 
    cPath = PathCombine(;
        GetSysDir(),;
        OSK_EXE )
 
RETURN IIF(FILE(cPath), m.cPath, OSK_EXE)
 
FUNCTION GetSysDir
    LOCAL cBuffer, nBufsize
    cBuffer=REPLICATE(CHR(0), MAX_PATH)
    nBufsize= GetSystemDirectory(@cBuffer, LEN(cBuffer)) 
RETURN SUBSTR(cBuffer, 1, nBufsize)
 
FUNCTION PathCombine(p1, p2, p3, p4, p5) As String
    LOCAL cBuffer, cPath1, cPath2, nIndex, nCount
    nCount = PCOUNT()
 
    DO CASE
    CASE nCount = 0
        RETURN ""
    CASE nCount = 1
        RETURN p1
    ENDCASE
 
    cBuffer = m.p1
 
    FOR nIndex=2 TO nCount
        cPath1 = STRTRAN(m.cBuffer, CHR(0), "")
        cPath2 = EVALUATE("m.p" + TRANSFORM(m.nIndex))
        cBuffer = REPLICATE(CHR(0), MAX_PATH)
        PathCombineApi(@cBuffer, cPath1, cPath2)
    NEXT
RETURN STRTRAN(m.cBuffer, CHR(0), "")
 
PROCEDURE declare
    DECLARE INTEGER GetSystemDirectory IN kernel32;
        STRING @lpBuffer, INTEGER nSize
 
    DECLARE INTEGER ShellExecute IN shell32;
        INTEGER hWindow, STRING lpOperation,;
        STRING lpFile, STRING lpParameters,;
        STRING lpDirectory, INTEGER nShowCmd
 
    DECLARE INTEGER PathCombine IN shlwapi;
    AS PathCombineApi;
        STRING @lpszDest, STRING lpszDir,;
        STRING lpszFile
 

User rating: 7.5/10 (4 votes)
Rate this code sample:
  • ~
1457 bytes  
Created: 2012-02-18 22:46:23  
Modified: 2013-08-14 11:46:10  
Visits in 7 days: 40  
Listed functions:
GetSystemDirectory
PathCombine
ShellExecute
Printer friendly API declarations
My comment:

On-Screen Keyboard class name is "OSKMainClass". With this knowledge, a VFP application can detect whether the On-Screen Keyboard window is visible -- by calling FindWindow. It can also move and hide the keyboard -- by calling SetWindowPos or similar API function.
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 © 2001-2015 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 (5.5.44), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.147.165.246)
17 sec.Example: 'Testing serial ports'
44 sec.Example: 'Using FrameRgn for displaying system colors'
2.82 min.Function: 'NetApiBufferSize'
Function group: 'Network Management'
Google
Advertise here!