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One comment i cant download it! Trending now. It features a simple interface with many customizable options:. Download multiple files at one time Download large files quickly and reliably Suspend active downloads and resume downloads that have failed.
Yes, install Microsoft Download Manager recommended No, thanks. What happens if I don't install a download manager? Why should I install the Microsoft Download Manager? In this case, you will have to download the files individually. You would have the opportunity to download individual files on the "Thank you for downloading" page after completing your download. Files larger than 1 GB may take much longer to download and might not download correctly. You might not be able to pause the active downloads or resume downloads that have failed.
Back Next. Details Version:. Transparency — Refers to the ability to see through something clearly and without obstruction. Think of it as clear glass. Translucency — People often use translucency and transparency interchangeably but they actually mean very different things. Translucency refers to the ability to see through something where the background appears unclear whether it is out-of-focus or simply blurry in some way.
Opacity — Opacity refers to the state of being opaque and opaque refers to something that is neither transparent nor translucent. Some applications and APIs use the term opacity to refer to a scale that ranges from completely opaque to completely transparent. Alpha Channel — An alpha channel provides additional information for each pixel in an image that facilitates compositing images together. Although Windows 95 supported window regions, it was not until Windows XP that the default theme used regions to present windows with rounded corners.
Although the default Windows Vista theme also presents windows with rounded corners, regions are no longer used unless you resort to the Windows Vista Basic theme. Glass — Glass is the catchy marketing terms that Windows Vista uses to refer to translucency. Presumably, the Windows developers felt it was easier to spell and comprehend. Desktop Composition — The DWM performs desktop composition, enabling visual effects on the desktop such as glass, 3D window transitions, etc.
As you can see, the first byte is always zero and the remaining three bytes store the individual red, green and blue values in reverse order. Each color value ranges from zero through If all three values are zero then the result is black. If all three values are then the result is white. For example, to represent red specify 0xFF. As you can see, RGB does not provide an alpha channel. The first byte stores the alpha value and the remaining three bytes store the red, green and blue values.
Note that the color values are stored in the opposite order to RGB. Drawing library in the. NET Framework. Is Composition Enabled? With the terminology out of the way, we can now dive into the guts of desktop composition. Of course, to take advantage of it we need to make sure that it is actually available at runtime.
The user may have disabled desktop composition for performance reasons. This can be done as follows: 1. Click the Performance Settings button. Although glass requires desktop composition, you can use desktop composition while disabling glass. Windows Vista provides the DwmIsCompositionEnabled function to determine whether composition is currently enabled. One solution is to use a blend of delay loading and runtime dynamic linking. The first step is to instruct the linker to delay load the DWM library.
Add dwmapi. You should already have dwmapi. With this in place, the DWM library will only be loaded the first time you call any of its functions, but how do you know whether it is safe to do so? The solution is to manually attempt to load the DWM library and for good measure attempt to retrieve the address of a DWM function.
If this is successful, you can assume it is running on Windows Vista or later. It then simply calls the DwmIsCompositionEnabled function, which will actually load the DWM library, to determine whether composition is enabled.
The other thing to keep in mind is that since the user, and other applications for that matter more on this in a moment , can enable and disable desktop composition at any time, your application needs to be able to cope with changes in the availability of desktop composition.
As I hinted at, it is possible for applications to temporarily disable desktop composition for the lifetime of the application or for some subset thereof. The DwmEnableComposition function allows you to disable desktop composition for the entire desktop. Desktop composition will be disabled until you call DwmEnableComposition again to enable it. If you fail to re-enable desktop composition, the system will automatically enable it when the application exits. Just remember, when you application exits, composition will be reset regardless of whether you re-enabled it.
Is Composition Translucent? I took the following two window clippings of the exact same window. The one on the left was taken with translucent glass and the one of the right with opaque glass. As you can see, the translucent glass provides a hint of the desktop background color as well as the recycle bin hiding underneath the window whereas the opaque glass only offers the aurora effect provided by the DWM.
Users can set the translucency as well as the composition color, the color used for rendering glass, as follows: 1. Blurring the Client Area Assuming desktop composition is enabled, the DWM will take care of rendering the non-client area of your window with glass. The client area however is opaque by default and applications must specifically request glass for all or part of the client area.
The ability to blur a region of the window is especially useful when combined with layered windows. Extending the Window Frame You may have noticed in the window clippings in the previous section that although the client area was blurred, the client edge was still visible.
If you want to render glass seamlessly then you need to use a different approach. Of course, if your window does not have a frame then DwmEnableBlurBehindWindow is good for the full extent of the window. The structure indicates how far into the client area the frame should be extended. Up to this point, I have focused on the DWM functions for control blurring. What I have not yet mentioned is the secret sauce you need to get the blurring to kick in.
Then of course, there is the issue of what to do with all that lovely glass. Presumably, you want to draw something on it! The trick with understanding how glass works is having an understanding of the relationship between the DWM functions and the contents of your window. Consider the following window clipping displaying a PNG image I created using Photoshop: The image painted on the window includes an alpha channel so the DWM faithfully blurs the background based on the transparency level of each individual pixel.
The catch is that virtually all of the GDI functions that Windows developers have learnt to use do not actually have any knowledge of alpha values in colors and do not perform alpha blending. The results are as you might expect: The trouble with using this technique for rendering glass is that anything you might want to draw on your window better not use a black GDI brush otherwise it will also appear translucent.
Consider a dialog box with an edit control: If we apply the technique of using a black GDI brush to this window, the results will be less the desirable: As you can see, since the control uses a black brush to draw the text, the DWM is fooled into thinking that this too should be rendered translucent.
One solution is to owner-draw the control.
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