Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
GDI+: Implementing image scrolling with inertia
Obtaining names and positions for shortcuts located on the Windows Desktop
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Enumerating devices installed on the local machine
Moving shortcut to a specified position on the Windows Desktop
Enumerating raw input devices attached to the system (keyboard, mouse, human interface device)
How to display Windows On-Screen Keyboard
Browsing Windows Known Folders (Special Folders)
Winsock: resolving an address to a host name
Adding a background image to VFP report (VFP9, ReportListener)
Displaying icons in the system tray (VFP9)
Displaying dimmed window behind VFP top-level form
Generating random cryptographic keys
Disconnecting USB Mass Storage Device programmatically
Displaying hypertext links with the SysLink control (VFP9, Comctl32.dll)
Printing Image File, programmatically set print page orientation to landscape
Switching between keyboard layouts
How to enable the SE_SHUTDOWN_NAME privilege for the application
Reading and setting system access privileges for the current process
How to find which fonts Windows uses for drawing captions, menus and message boxes
Customizing the frame of top-level form: removing the standard frame (VFP9, Vista)
Compressing and decompressing files with Windows API Runtime Library routines
GDI+: Creating thumbnails to preview images in a directory
Detecting changes in connections to removable drives (VFP9)
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: 252  
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 (5.6.30), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.81.140.221)
7.66 hrs.Function: 'waveOutSetVolume'
7.67 hrs.Example: 'GDI+: sending image of FoxPro form to printer'
7.68 hrs.Example: 'WAV file player'
Google
Advertise here!