How to make a VFP form fading out when released (GDI version) -- Visual FoxPro : Using Win32 (WinAPI) Functions


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How to make a VFP form fading out when released (GDI version)

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Before you begin:

When a VFP form is released, usually it disappears immediately. Wouldn`t it be nice to have a form slowly (or less slowly) fading out?

An obvious way of doing that is covering the form with another window, which holds the image of the original form. Once covered, the original form disappears. After that the covering window gradually changes its opacity (alpha channel) from opaque (255) to completely transparent (0).

This code sample is based on solely GDI calls, no GDI+ library is required. Beside fading, the form is shrinking too.

See also:

How to make a VFP form fading out when released (GDI+ version)

How to draw custom Window Caption on FoxPro form

Animating a transition of the VFP form (a wire-frame rectangle)


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10568 bytes
Created: 2007-04-24 16:23:35
Modified: 2009-03-03 14:41:02
Visits in 7 days: 142

Listed functions:

BitBlt
CreateCompatibleBitmap
CreateCompatibleDC
CreateRectRgn
CreateSolidBrush
CreateWindowEx
DeleteDC
DeleteObject
DestroyWindow
FillRect
GetDC
GetSystemMetrics
GetWindowDC
GetWindowLong
GetWindowRect
RealGetWindowClass
ReleaseDC
SelectObject
SetLayeredWindowAttributes
SetWindowLong
SetWindowRgn
StretchBlt

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