Was this reply helpful? Yes No. Sorry this didn't help. Thanks for your feedback. Couple of things: 1 The current installed driver is the latest from Intel. I installed it only recently;unfortunately the problem persists. The only option there is 60 hertz which is the current setting. The desktop's going to look fuzzy. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question 3.
Report abuse. Details required :. Cancel Submit. Earlier we noted the two functions you can use to get the glass effect into your program. A window with the Aero scheme has glass in the title bar area and in a border around the edges of the window-essentially all of the non-client area of the window. This function allows you to extend each of the sides of the non-client area rendering into the client area, rendering it with the glass effect.
In other words, you can extend the top, left, right and bottom edges of the glass window frame into your window seamlessly. The second function is DwmEnableBlurBehindWindow, which lets you render an arbitrarily shaped region with the glass effect and specify more parameters with greater control over the effect, though I suspect that most users of the glass effect will simply extend the glass from the edge into the client area.
With either function, you'll need to closely track the composition status to see if you should render with the glass effect enabled. Let's look at the simpler call first. This function is intended for use on windows without a frame such as the taskbar, Sidebar, tablet pen input window, and the Start menu ; behavior on framed windows is undefined.
The window handle is the window for which the frame is to be extended from the edge into the client area. It's a bit confusing at first since there are no other Win32 functions that work like this, but, basically, you control each side independently from the others.
Pick the sides you want to extend and specify how far into the client area the effect should be rendered see Figure 9. If you want more than one side to be extended, they can overlap. If you want the effect to dynamically track the window size, then you'll need to call the DwmExtendFrameIntoClientArea function every time the window size changes.
A special case is to set one or more margins to -1, which will then extend the glass effect to your entire window. So what do you do if you don't want to extend the glass effect from the frame into the client area? The DwmEnableBlurBehindWindow function gives you a bit more control over how the glass effect is added to your window.
The most important one of the parameters is a region, which is a GDI term that describes an arbitrarily shaped area that is usually constructed out of a series of lines and curves. If you want to turn on the glass effect in the client area, you set the fEnable flag to true.
To turn it off you'd set the flag to false. The hRgnBlur parameter is a handle to a region you create that the glass effect appears on.
The final parameter, fTransitionOnMaximized, is a bit misleading. Since the glass effect is turned off on windows that are maximized, you'd think this flag would have something to do with that.
This flag actually controls whether or not the window transitions to the maximized color when there is a maximized window on the desktop. Unfortunately, if you set this parameter to true, when you render the window you'll get a region without the transparency, just the aurora effect. The dwFlags parameter is how you tell the interface which parameters you are setting; when you want to set a parameter, you'll need to turn on the corresponding bit in the dwFlags parameter.
This is consistent throughout the DWM interface. Don't forget that you'll have to render the glass color into the region. Using the same black brush that was used in DwmExtendFrameIntoClientArea will work fine for creating a glass effect on the specified region. It's easy to see that DWM has provided two interfaces for you-the more complicated one that lets you construct an arbitrarily shaped region, and the simple one that just lets you extend the window frames glass effect into your client area so you can draw additional controls and the like onto something that looks like it's part of the title bar.
In both cases, you have to worry about what happens to the region's shape when the window is resized and update the area to render the glass effect in if it's not the entire client area.
The source code that accompanies this article will allow you to set both an extended client frame or a region and to toggle the composition flag as well. Using glass as a background on your window is a bit tricky. If you render anything naturally opaque such as GDI functions , you'll get your item rendered on glass, though sometimes with unexpected results. One particular gotcha is that rendering a GDI item in black uses the bit pattern 0xwhich also happens to be a completely transparent black if you are using an alpha channel.
This means that if you draw with a black GDI brush or pen you'll get a transparent color, not a black one. The biggest problem this presents is when you try to use the default text color in a control of a text label that sits on the glass area.
Since the default text color is usually black, the DWM will consider this to be transparent and the text will be written in the glass incorrectly. An example can be seen in Figure As you can see, it's nearly illegible because it's actually incorrectly rendered text that shows up as gray, not black. Happily, there are a number of ways around this problem. Using owner-draw controls is one. Rendering to a bitmap that has an alpha channel is another. Fortunately, the easiest way to get text on controls is to let the.
NET Framework 2. This is easily accomplished by setting the UseCompatibleTextRendering property on your controls. By default, this property is set to false so that controls written for previous versions of the.
NET Framework will render the same. But if you set it to true, your text will come out looking correct. You can set the property globally with the Application. You can just edit this to set it to true as shown below and all your controls will look correct when written on a glass window. You should enable the glass effect just before you start rendering your window. The composition engine will look at the alpha values of your window and will apply the blur effect to those regions that are not opaque.
This can be a problem when using some GDI functions because they don't preserve alpha values. Getting the glass effect in DirectX applications is done the same way. All you need to do is to control the alpha value of the render target in addition to using one of the two glass-enabling DWM functions.
Wherever you've told the DWM to use glass, it'll use the alpha value of the render target. Anywhere else, the render target should be opaque or you'll get undefined behavior.
Thumbnails are live display-only windows on open applications rendered by the DWM. You can essentially request a thumbnail of an application's window and have it rendered in your application. The thumbnail API will provide you with a live representation of an application's window.
Thumbnails are simple to use, as most of the hard work is done for you by Windows. The hard part is getting hold of an app's HWND. The OS takes care of updating from then on. Whenever the source window is changed, the change is reflected in the target window. To use a thumbnail, you must first register a thumbnail using the DwmRegisterThumbnail function.
You provide two window handles, the source HWND that is, the window you want the thumbnail view of and the target HWND the window where you want the thumbnail rendered. When you are finished using a thumbnail, you have to let the DWM know that the relationship is ending by calling DwmUnregisterThumbnail. On average, DWM. In most cases, this nothing since many now have PCs with at least 4 gigabytes RAM , but for some it is critical.
It should immediately be said that the termination of the dwm. If this done, then after a few seconds he will still return. Change themes on the classic too, except for the release of a certain amount memory, will not give anything. However, disabling this DWM. EXE service is not recommended, so as this in most cases will not give a performance gain, and in some situations it will harm the operation of the system. I hope you figured it out what kind of process is dwm.
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