Using Win32 functions in Visual FoxPro Image Gallery
Device Context
..msdn
ChangeDisplaySettings
CreateCompatibleDC
CreateDC
DeleteDC
DeleteObject
EnumDisplayDevices
EnumDisplaySettings
GetDC
GetDeviceCaps
GetObject
GetObjectType
ReleaseDC
SelectObject
Code examples:
Bitmap Class for Visual FoxPro application
Converting twips to pixels and vice versa
Copying picture of the active form to the Clipboard using Enhanced Metafile API functions
Creating a clipping region from the path selected into the device context of a form
Creating a window using CreateWindowEx function
Displaying animated images on FoxPro form with BitBlt and StretchBlt functions
Displaying bitmap using the AlphaBlend function
Displaying the associated icons and descriptions for files and folders
Drawing a rectangle using Windows regular edges and borders
Drawing a window caption using the DrawCaption routine
Drawing cursors for the classes defined by the system (preregistered): BUTTON, EDIT, LISTBOX etc.
Drawing icons associated with the VFP main window
Drawing standard Windows icons
Drawing Windows frame controls using the DrawFrameControl function
Drawing Windows predefined bitmaps using the LoadBitmap functions
Form Magnifier
GDI+ fun: roach-infested desktop
GDI+: Color Transparency
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
GDI+: Creating thumbnails to preview images in a directory
GDI+: custom control, base class
GDI+: how to make VFP controls visually shake and shudder
GDI+: Implementing image scrolling with inertia
GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
GDI+: Scrolling through large image using the mouse
GDI+: sending image of FoxPro form to printer
How to change the name and the size of the font in the MessageBox dialog
How to copy the image of a form to the Clipboard using Bitmap API functions
How to display picture stored in enhanced-format metafile (*.emf)
How to find which fonts Windows uses for drawing captions, menus and message boxes
How to make a VFP form fading out when released (GDI version)
How to make a VFP form fading out when released (GDI+ version)
How to play AVI file on the _screen
How to print a bitmap file
How to print FoxPro form
How to print FoxPro form -- II
How to print picture stored in enhanced-format metafile (*.emf)
How to put a horizontal text scrolling on the form (a news line, marquee)
How to put a vertical text scrolling on the form (a movie cast)
How to view icons stored in executable files (Icon Viewer)
How to view icons stored in executable files (Icon Viewer) - II
Obtaining the bounding rectangle for the specified device context
Placing an arbitrary rectangular area of main VFP window on the Clipboard
Placing On-screen Alert on top of all windows
Printing text on the client area of the main VFP window
Printing text on the main VFP window
Printing text with the Escape function
Reading metrics for the currently selected font
Retrieving graphic capabilities of your display
Splash Screen for the VFP application
Storing content of the Clipboard to a bitmap file
Storing screen shot of a form to bitmap file
Storing screen shot of a form to enhanced metafile (*.emf)
Subclassing CommandButton control to create BackColor property
Using Font and Text functions
Using FrameRgn for displaying system colors
Using GetNearestColor
Using the DrawText function
Using the GradientFill function
Using the LoadImage function to have a bitmap file loaded and displayed on VFP main window
Vertical Label control
Printing text on the main VFP window

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More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
#DEFINE ANSI_CHARSET          0
#DEFINE OUT_DEFAULT_PRECIS    0
#DEFINE OUT_DEVICE_PRECIS     5
#DEFINE OUT_OUTLINE_PRECIS    8

#DEFINE CLIP_DEFAULT_PRECIS   0
#DEFINE CLIP_STROKE_PRECIS    2

#DEFINE DEFAULT_QUALITY       0
#DEFINE PROOF_QUALITY         2

#DEFINE DEFAULT_PITCH         0
#DEFINE FW_BOLD             700

#DEFINE TRANSPARENT           1
#DEFINE OPAQUE                2

    DO decl

    lcText = "Printing Text"
    FOR ii=200 TO 1 STEP-1
        lnColor = Rgb(Max(0,255-ii), Max(0,128-ii*5), Min(255,128+ii*10))
        = _print (lcText, lnColor, -ii)

        ii = ii - 30
        = _print (lcText, Rgb(80,80,80), -ii)
    ENDFOR
    = _print (lcText, Rgb(164,0,0), 0)

PROCEDURE  _print (lcText, lnColor, lnAngle)
    hFont = CreateFont (;
        100,0, lnAngle,lnAngle, FW_BOLD, 0,0,0, ANSI_CHARSET,;
        OUT_OUTLINE_PRECIS, CLIP_STROKE_PRECIS,;
        PROOF_QUALITY, DEFAULT_PITCH, "Times New Roman")

    hwnd = GetActiveWindow()
    hdc = GetWindowDC (hwnd)

    * select new font into the device context
    * and delete the old one
    = DeleteObject (SelectObject (hdc, hFont))

    * set text color on a transparent background
    = SetTextColor (hdc, lnColor)
    = SetBkMode (hdc, TRANSPARENT)

    * the printing
    = TextOut (hdc, 50, 100, lcText, Len(lcText))

    * release system resources
    = DeleteObject (hFont)
    = ReleaseDC (hwnd, hdc)

PROCEDURE  decl
    DECLARE INTEGER GetActiveWindow IN user32
    DECLARE INTEGER GetWindowDC IN user32 INTEGER hwnd   

    DECLARE INTEGER DeleteObject IN gdi32 INTEGER hObject
    DECLARE INTEGER ReleaseDC IN user32;
        INTEGER hwnd, INTEGER hdc

    DECLARE INTEGER SetTextColor IN gdi32;
        INTEGER hdc, INTEGER crColor

    DECLARE INTEGER SelectObject IN gdi32;
        INTEGER hdc, INTEGER hObject

    DECLARE INTEGER TextOut IN gdi32;
        INTEGER hdc, INTEGER x, INTEGER y,;
        STRING  lpString, INTEGER nCount

    DECLARE INTEGER SetBkMode IN gdi32;
        INTEGER hdc, INTEGER iBkMode

    DECLARE INTEGER CreateFont IN gdi32;
        INTEGER nHeight, INTEGER nWidth,;
        INTEGER nEscapement, INTEGER nOrientation,;
        INTEGER fnWeight, INTEGER fdwItalic,;
        INTEGER fdwUnderline, INTEGER fdwStrikeOut,;
        INTEGER fdwCharSet,;
        INTEGER fdwOutputPrecision,;
        INTEGER fdwClipPrecision,;
        INTEGER fdwQuality,;
        INTEGER fdwPitchAndFamily,;
        STRING  lpszFace


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2299 bytes  
Created: 2001-07-12 12:00:00  
Modified: 2001-11-04 21:25:36  
Visits in 7 days: 56  
Listed functions:
CreateFont
DeleteObject
GetActiveWindow
GetWindowDC
ReleaseDC
SelectObject
SetBkMode
SetTextColor
TextOut
Printer friendly API declarations
My comment:
Any output from FoxPro command like CLEAR and ?/?? wipes the image produced by this code. Curiously CLEAR command even standing above the TextOut in a source code sometimes removes any printing produced by the TextOut.
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