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:
An alternative way of setting Form.Closable to False
Bitmap Class for Visual FoxPro application
Converting image file to .ICO file
Creating a clipping region from the path selected into the device context of a form
Custom GDI+ class
Displaying animated images on FoxPro form with BitBlt and StretchBlt functions
Displaying bitmap using the AlphaBlend function
Displaying dimmed window behind VFP top-level form
Drawing Windows predefined bitmaps using the LoadBitmap functions
How to change the name and the size of the font in the MessageBox dialog
How to convert a bitmap file to monochrome format (1 bpp)
How to copy the image of a form to the Clipboard using Bitmap API functions
How to create transparent areas inside a form -- punching holes in the form
How to draw custom Window Caption on FoxPro form
How to make a VFP form fading out when released (GDI version)
How to print a bitmap file
How to print FoxPro form
How to put a horizontal text scrolling on the form (a news line)
How to put a vertical text scrolling on the form (a movie cast)
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 main VFP window
Printing text with the Escape function
Round FoxPro form
Splash Screen for the VFP application
Storing content of the Clipboard to a bitmap file
Storing screen shot of a form to bitmap file
Subclassing CommandButton control to create BackColor property
Using Common Controls: the Header Control
Using FrameRgn for displaying system colors
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: 167  
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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