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:
Converting twips to pixels and vice versa
Copying picture of the active form to the Clipboard using Enhanced Metafile API functions
Displaying the associated icons and descriptions for files and folders
How to find which fonts Windows uses for drawing captions, menus and message boxes
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 view icons stored in executable files (Icon Viewer) - II
Printing text with the Escape function
Retrieving graphic capabilities of default printer
Retrieving graphic capabilities of your display
Storing screen shot of a form to enhanced metafile (*.emf)
Subclassing CommandButton control to create BackColor property
Vertical Label control
How to print FoxPro form -- II

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Before you begin:
Call this code from a method or event of FoxPro form to print image of the form on your default printer. Window handle of the form is obtained through GetFocus function. That is why this form has to be active, possessing the keyboard focus.

This code sample is based on Enhanced Metafile API functions. In a similar example How to print a FoxPro form a "bitmap" approach is used.

Enhanced metfaile functions make this code sample comparatively short and easy to understand.

See also:
  • How to print FoxPro form (GDI)
  • GDI+: sending image of FoxPro form to printer
  • Storing screen shot of a form to a BMP file
  • Storing clipboard contents to a BMP file
  • Using the LoadImage() to display a BMP file on the main VFP window
  • How to print a BMP file
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    User rating: 0/10 (0 votes)
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    3814 bytes  
    Created: 2003-05-26 09:44:05  
    Modified: 2011-12-10 09:20:22  
    Visits in 7 days: 36  
    Listed functions:
    BitBlt
    CloseEnhMetaFile
    CreateEnhMetaFile
    DeleteDC
    DeleteEnhMetaFile
    EndDoc
    EndPage
    GetDeviceCaps
    GetFocus
    GetWindowDC
    GetWindowRect
    PlayEnhMetaFile
    PrintDlg
    ReleaseDC
    StartDoc
    StartPage
    Printer friendly API declarations
    My comment:


    #kwd: sln_printform.
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    User Contributed Notes:
    Willson | 2007-08-23 14:52:42
    I have a question about this,

    * scaling factor values from screen to printer
    xScale = GetDeviceCaps(hPrnDC, HORZRES)/(GetDeviceCaps(hPrnDC, HORZSIZE) * 100)
    yScale = GetDeviceCaps(hPrnDC, VERTRES)/(GetDeviceCaps(hPrnDC, VERTSIZE) * 100)
    rcMeta = num2dword(0) + num2dword(0) + num2dword(nWidth*xScale) + num2dword(nHeight*yScale)

    The code following the comment, "scaling factor values from screen to printer" seems to only reference hPrnDC in each of the calls to GetDeviceCaps() -- no reference to a screen DC -- whereas in example #158, there is an identical comment which is followed by different code:

    * scaling factor values from screen to printer
    xScale = GetDeviceCaps(hPrnDC, LOGPIXELSX)/GetDeviceCaps(hFormDC, LOGPIXELSX)
    yScale = GetDeviceCaps(hPrnDC, LOGPIXELSY)/GetDeviceCaps(hFormDC, LOGPIXELSY)

    Please advise? Thanks.

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