OS Version | Known problems and restrictions |
Windows 2000/XP
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In Windows 2000 Microsoft introduced a new feature in the visual interface - fading effect for windows
through implementation of layered windows. This effect allows showing and hiding a window by means of
changing its transparency. However, as practice showed this effect wasn't implemented with well considering
another feature - custom window shapes called regions. When a window uses both it often
produces interface glitches such as blinking black background when redrawing the window, or similar
effects. This problem hasn't been solved in Windows XP either. However, such interface glitches are
not consistent, and may in fact present on very few computers, especially with Windows XP.
For this reason when developing a project to use tooltips under Windows 2000/XP it is recommended to
decide which effect is more important for the project - the fading effect, or rounded tooltips with callouts (custom shape tooltip), and
use only one of them.
Alternatively, it is recommended to use one of the tooltip's embedded themes, as they were designed to work correctly
always.
09.02.2003 It is known now that the problem is a result of some video drivers being not fully compatible with the operational
systems of subject. For instance, for all systems that use video cards based on NVidia graphical chips this problem
can be solved by installing a set of drivers from NVidia
to improve functionality of their video systems in Windows.
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Windows 2000 |
The tooltip doesn't support the shadow effect under Windows 2000, because Microsoft first introduced shadows in Windows XP.
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Windows 98/Me |
- Tooltips do not support shadows and fading effect
- Interface IVXPMenuHook doesn't support transparency for menus and windows
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Windows 95/NT4 |
- The same restrictions as for Windows 98/Me
- Interface IVXPMenuHook is not functional
- Depending on OS upgrades graphical formats GIF, JPEG, WMF and EMF might be unsupported
- Function GradientFillRect of the IVXPQuickHTML interface is not supported
- Any other restrictions not yet found
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