Using Win32 functions in Visual FoxPro Image Gallery
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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 image file to .ICO file
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
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 make a VFP form fading out when released (GDI version)
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
Splash Screen for the VFP application
Storing screen shot of a form to bitmap file
Subclassing CommandButton control to create BackColor property
Using the LoadImage function to have a bitmap file loaded and displayed on VFP main window
Vertical Label control
How to put a horizontal text scrolling on the form (a news line)

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See also:
  • Scrolling text on the form vertically (a movie cast)
  • Shaking VFP form controls
  • Playing AVI on _screen
  • Displaying animated images
  • Form Magnifier

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    		7694 bytes  
    Created: 2002-12-22 13:45:42  
    Modified: 2011-12-10 09:20:22  
    Visits in 7 days: 198  
    Listed functions:
    BitBlt
    CreateCompatibleBitmap
    CreateCompatibleDC
    CreateFont
    CreateSolidBrush
    DeleteDC
    DeleteObject
    FillRect
    GetActiveWindow
    GetDesktopWindow
    GetFocus
    GetTickCount
    GetWindowDC
    ReleaseDC
    SelectObject
    SetBkColor
    SetBkMode
    SetTextColor
    TextOut
    		Printer friendly API declarations
    My comment:
    The complete character string is written on invisible canvas, which is a virtual device context.

    At each Timer tick an offset is calculated, and a smaller part of the large image is copied from the invisible canvas to a visible one.

    A visible canvas is the Device Context created either for an instance of a Form or for the _SCREEN object -- the object must have valid HWnd.
    Word Index links for this example:
    Device Context
    vfp form
    scrolling
    text scrolling
    horizontal text scrolling
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