How to put a horizontal text scrolling on the form (a news line) -- Visual FoxPro : Using Win32 (WinAPI) Functions


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How to put a horizontal text scrolling on the form (a news line)

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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: 165

Listed functions:

BitBlt
CreateCompatibleBitmap
CreateCompatibleDC
CreateFont
CreateSolidBrush
DeleteDC
DeleteObject
FillRect
GetActiveWindow
GetDesktopWindow
GetFocus
GetTickCount
GetWindowDC
ReleaseDC
SelectObject
SetBkColor
SetBkMode
SetTextColor
TextOut

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.

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horizontal text scrolling

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