Using Win32 functions in Visual FoxPro Image Gallery
Painting and Drawing
..msdn
DrawAnimatedRects
DrawCaption
DrawEdge
DrawFrameControl
GdiFlush
GdiGetBatchLimit
GdiSetBatchLimit
GetBkMode
GetBoundsRect
GetWindowDC
GetWindowRgnBox
LockWindowUpdate
PaintDesktop
SetBkColor
SetBkMode
SetWindowRgn
WindowFromDC
Code examples:
Bitmap Class for Visual FoxPro application
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
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 Windows frame controls using the DrawFrameControl function
Drawing Windows predefined bitmaps using the LoadBitmap functions
Form Magnifier
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+: how to make VFP controls visually shake and shudder
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)
How to put a vertical text scrolling on the form (a movie cast)
Obtaining the bounding rectangle for the specified device context
Placing an arbitrary rectangular area of main VFP window on the Clipboard
Printing text on the main VFP window
Printing text with the Escape function
Reading metrics for the currently selected font
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 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
Reading metrics for the currently selected font

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DO decl
 
*|typedef struct tagTEXTMETRIC { 
*|  LONG tmHeight;             0:4
*|  LONG tmAscent;             4:4
*|  LONG tmDescent;            8:4
*|  LONG tmInternalLeading;    12:4
*|  LONG tmExternalLeading;    16:4
*|  LONG tmAveCharWidth;       20:4
*|  LONG tmMaxCharWidth;       24:4
*|  LONG tmWeight;             28:4
*|  LONG tmOverhang;           32:4
*|  LONG tmDigitizedAspectX;   36:4
*|  LONG tmDigitizedAspectY;   40:4
*|  TCHAR tmFirstChar;         44:1
*|  TCHAR tmLastChar;          45:1
*|  TCHAR tmDefaultChar;       46:1
*|  TCHAR tmBreakChar;         47:1
*|  BYTE tmItalic;             48:1
*|  BYTE tmUnderlined;         49:1
*|  BYTE tmStruckOut;          50:1
*|  BYTE tmPitchAndFamily;     51:1
*|  BYTE tmCharSet;            52:1
*|} TEXTMETRIC, *PTEXTMETRIC;
 
    LOCAL lcBuffer, hWindow, hDC
    lcBuffer = Repli(Chr(0), 250)
    hWindow = GetActiveWindow()
    hDC = GetWindowDC(hWindow)
 
    = GetTextMetrics(hDC, @lcBuffer)
 
    = _add("Height (ascent + descent)",;
        b2d(SUBS(lcBuffer, 1,4)))
 
    = _add("Ascent (units above the base line)";
         b2d(SUBS(lcBuffer, 5,4)))
 
    = _add("Descent (units below the base line)",;
        b2d(SUBS(lcBuffer, 9,4)))
 
    = _add("Leading inside the bounds...",;
        b2d(SUBS(lcBuffer, 13,4)))
 
    = _add("Extra leading added between rows",;
        b2d(SUBS(lcBuffer, 17,4)))
 
    = _add("Avg width of characters",;
        b2d(SUBS(lcBuffer, 21,4)))
 
    = _add("Width of the widest character",;
        b2d(SUBS(lcBuffer, 25,4)))
 
    = _add("Weight of the font",;
        b2d(SUBS(lcBuffer, 29,4)))
 
    = _add("Extra width per string", b2d(SUBS(lcBuffer, 33,4)))
 
    = _add("Optimal horiz aspect", b2d(SUBS(lcBuffer, 37,4)))
 
    = _add("Optimal vert aspect", b2d(SUBS(lcBuffer, 41,4)))
 
    = _add("First character defined", Asc(SUBS(lcBuffer, 45,1)))
 
    = _add("Last character defined", Asc(SUBS(lcBuffer, 46,1)))
 
    = _add("Substitute if char not found", Asc(SUBS(lcBuffer, 47,1)))
 
    = _add("Char for word breaks", Asc(SUBS(lcBuffer, 48,1)))
 
    = _add("Italic", Asc(SUBS(lcBuffer, 49,1)))
    = _add("Underlined", Asc(SUBS(lcBuffer, 50,1)))
    = _add("Strikeout", Asc(SUBS(lcBuffer, 51,1)))
 
    = _add("Font pitch", BitAnd(15,Asc(SUBS(lcBuffer, 52,1))))
    = _add("Font family", BitAnd(240,Asc(SUBS(lcBuffer, 52,1))))
 
    = _add("Font Character Set", Asc(SUBS(lcBuffer, 53,1)))
 
    ReleaseDC(hWindow, hDC)
    GO TOP
    BROW NORMAL NOWAIT
* end of main
 
PROCEDURE _add(lcName, lnValue)
    IF Not USED("csResult")
        CREATE CURSOR csResult (paramname C(35), paramvalue C(50))
    ENDIF
    INSERT INTO csResult VALUES (m.lcName, LTRIM(STR(m.lnValue)))
 
PROCEDURE decl
    DECLARE INTEGER GetActiveWindow IN user32
    DECLARE INTEGER GetWindowDC IN user32 INTEGER hwnd
 
    DECLARE INTEGER ReleaseDC IN user32 ;
        INTEGER hwnd,  INTEGER hdc
 
    DECLARE INTEGER GetTextMetrics IN gdi32;
        INTEGER hdc, STRING @lptm
 
FUNCTION  b2d(lcBuffer)
RETURN Asc(SUBS(lcBuffer, 1,1)) + ;
    BitLShift(Asc(SUBS(lcBuffer, 2,1)),  8) +;
    BitLShift(Asc(SUBS(lcBuffer, 3,1)), 16) +;
    BitLShift(Asc(SUBS(lcBuffer, 4,1)), 24)
 
 
 

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3076 bytes  
Created: 2002-11-02 14:21:03  
Modified: 2007-05-04 08:58:10  
Visits in 7 days: 76  
Listed functions:
GetActiveWindow
GetTextMetrics
GetWindowDC
ReleaseDC
Printer friendly API declarations
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