Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Obtaining names and positions for shortcuts located on the Windows Desktop
GDI+: Implementing image scrolling with inertia
Winsock: sending email messages (SMTP, port 25)
Custom GDI+ class
Custom HttpRequest class (WinHTTP)
Displaying dimmed window behind VFP top-level form
Printing Image File, programmatically set print page orientation to landscape
Compressing and decompressing files with Windows API Runtime Library routines
GDI+: Color Transparency
Detecting changes in connections to removable drives (VFP9)
Monitoring clipboard content changes (VFP9)
Writing entries to custom Event Log
Generating random cryptographic keys
Disconnecting USB Mass Storage Device programmatically
How to load a user profile
Switching between keyboard layouts
How to enumerate logon sessions on local computer
How to control Adobe Reader 9.0 (SDI mode) from VFP application
Moving shortcut to a specified position on the Windows Desktop
Reading and setting system access privileges for the current process
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Splash Screen for the VFP application
Browsing Windows Known Folders (Special Folders)
Class for sound recording
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 using Windows On-Screen Keyboard instead. This virtual keyboard 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.
#include "stdafx.h"
#include < windows.h >
#include < shlwapi.h >

void StartOnScreenKeyboard();

int _tmain(int argc, _TCHAR* argv[])
{
    StartOnScreenKeyboard();
    return 0;
}

void StartOnScreenKeyboard()
{
    const char* oskPath = "osk.exe";

    char* winDirPath = (char*)calloc(MAX_PATH, 1);
    GetEnvironmentVariable("WINDIR", winDirPath, MAX_PATH);
    if (!winDirPath) return;

    char* sysDirPath = (char*)calloc(MAX_PATH, 1);
    char* targetPath = (char*)calloc(MAX_PATH, 1);

    PathCombine(targetPath, winDirPath, "sysnative");
    PathCombine(targetPath, targetPath, oskPath);

    if (!PathFileExists(targetPath))
    {
        GetSystemDirectory(sysDirPath, MAX_PATH);
        PathCombine(targetPath, sysDirPath, oskPath);
    }

    free(sysDirPath);
    free(winDirPath);

    if (PathFileExists(targetPath))
    {
        ShellExecute(
            (HWND)0, 
            "open", 
            targetPath, 
            NULL, 
            NULL, 
            SW_NORMAL);
    }

    free(targetPath);
}

User rating: 7.5/10 (4 votes)
Rate this code sample:
  • ~
943 bytes  
Created: 2012-02-18 22:46:23  
Modified: 2015-10-28 09:36:34  
Visits in 7 days: 88  
Listed functions:
GetSystemDirectory
PathCombine
ShellExecute
Printer friendly API declarations
My comment:

On-Screen Keyboard`s window class name is "OSKMainClass". Knowing this, a VFP application can test the visibility of the On-Screen Keyboard by calling the FindWindow. By calling the SetWindowPos or similar API function, the virtual keyboard can be shown, hidden, or positioned at a specified point on the screen.
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 (5.6.34), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.166.48.3)
6 sec.Example: 'Enumerating ODBC drivers available on the local computer'
10 sec.Function: 'AVIStreamGetFrame'
Function group: 'Windows Multimedia'
14 sec.Function: 'CeFindAllFiles'
Function group: 'Remote Application Programming (RAPI)'
20 sec.Function: 'GetOpenFileName'
22 sec.Example: 'How to prevent users from accessing the Windows Desktop and from switching to other applications'
27 sec.
Function group: 'GDI+ StringFormat'
30 sec.Example: 'Placing a button on the VFP form as a new child window'
33 sec.Example: 'Basic Volume information'
41 sec.
Function group: 'URL Monikers'
45 sec.Function: 'EnumPorts'
Google
Advertise here!