Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
How to change display settings: screen resolution, screen refresh rate
GDI+: Storing content of the Clipboard to a bitmap file
GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
Using FoxTray ActiveX control: System Tray Icon and menu attached to VFP form
Custom GDI+ class
How to convert a bitmap file to monochrome format (1 bpp)
Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera
GDI+: Implementing image scrolling with inertia
Capturing keyboard activity of another application with the Raw Input API (VFP9)
GDI+: converting image file to another graphics format
Storing content of the Clipboard to a bitmap file
Custom HttpRequest class (WinHTTP)
How to display Windows On-Screen Keyboard
How to put a horizontal text scrolling on the form (a news line, marquee)
Retrieving the name of the primary domain controller (PDC) and join status information
Winsock: sending email messages (SMTP, port 25)
Mapping and disconnecting network drives
GDI+: creating scaled copy of image file
Extended MessageBox Class
How to detect if additional monitor is connected and active
Custom HttpRequest class (WinINet)
GDI+: reading and writing metadata in JPEG and TIFF files
Displaying the associated icons and descriptions for files and folders
Storing screen shot of a form to bitmap file

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Before you begin:
Call this code from a VFP form to store its snapshot to a bitmap file (24-bpp). Make sure that the target file (m.lcFilename) is a valid path.

Check similar example Storing screen shot of a form to enhanced metafile (*.emf).

See also:

Download ScreenCapture Library

  • GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
  • Printing the image of a FoxPro form
  • Storing clipboard contents to a BMP file
  • Using the LoadImage() to display a BMP file on the main VFP window
  • How to print a bitmap file

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    9378 bytes  
    Created: 2001-11-05 20:12:41  
    Modified: 2011-03-28 09:42:56  
    Visits in 7 days: 94  
    Listed functions:
    BitBlt
    CloseHandle
    CopyIcon
    CreateCompatibleBitmap
    CreateCompatibleDC
    CreateFile
    DeleteDC
    DeleteObject
    DestroyIcon
    DrawIcon
    GetCursorInfo
    GetDIBits
    GetFocus
    GetWindowDC
    GetWindowRect
    GlobalAlloc
    GlobalFree
    ReleaseDC
    SelectObject
    ShowCursor
    WriteFile
    Printer friendly API declarations
    My comment:
    The resulting file is forced to be in 24-bit format (24 bits per pixel). It is not compressed.

    The part of DIB (Device-Independent Bitmap), that contains pixel data, can be too large for managing it via VFP strings. For that reason the GlobalAlloc/GlobalFree combination is used to allocate/release memory for this buffer.

    The WriteFile function is declared in two different ways: one for strings and another for pointers.

    Microsoft Knowledge Base Article - 161299
    HOWTO: Capture and Print the Screen, a Form, or Any Window

    * * *
    April 5, 2006: a procedure added that draws current mouse cursor on the bitmap.

    * * *
    FileFormat.Info references on file extensions, file formats, MIME types, data conversion between formats and more.
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