I am working on performance profiling NDIS filter driver on Windows 10. I am using Windows Performance Recorder (WPR) and Windows Performance Analyzer (WPA) for this purpose. I am able to see the CPU usage graphs for processes but I am interested in load points in the driver code, which I am not able to get. It might be because I am not using the tools appropriately. Is there any guide or tutorial which can help me use these tools to get the desired results? My objective is to get a similar report like Oprofile in Linux.
Can someone suggest me whether WPR/WPA are the right tools that I am using? Is there any other better tool which can be more appropriate for my requirement?
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I want to write something like DaemonTools: a software that presents itself to the system as a real device (a DVD-ROM in the previous example) but it reads the data from a file instead. My requirement is not limited to DVD-ROM. The first goal is a joystick/gamepad for Windows.
I'm a web developer, so I don't know from where I could start such a project. I believe it will have to be written in C/C++, but other than that, I have no clue where to start.
Did anyone tried something like this and can give me some starting tips ?
Most drivers are written in either C or C++, so if you don't know those languages reasonably well, you'll want to get familiar with them before you start. Windows programming uses a lot of interesting shortcuts that might be confusing to a beginner - for example PVOIDs (typedef void* PVOID) and LPVOIDs (typedef void* far LPVOD;). You'll need to be happy with pointers as concepts as well as structures because you'll be using a lot of them. I'd suggest writing a really straightforward win32 app as an exercise in getting to grips with the Windows style of doing C/C++.
Your next port of call then is to navigate the Windows Driver Kit - specifically, you'll need it to build drivers for Windows. At this stage my ability to advise really depends on what you're doing and the hardware you have available etc, or whether or not you're really using hardware. You'll need to know how to drive your hardware and from there you'll need to choose an appropriate way of writing a driver - there are several different types of driver depending on what you need to achieve and it might be you can plug into one of these.
The windows driver kit contains quite a large number of samples, including a driver that implements a virtual toaster. These should provide you with starting points.
I strongly suggest you do the testing of this in a virtual machine. If your driver successfully builds, but causes a runtime error, the result could well crash windows entirely if you're in kernel-mode. You will therefore save yourself some pain by being able to revert the virtual machine if you damage it, as well as not having to wait on your system restarting. It'll also make debugging easier as virtual serial cables can be used.
This is quite a big undertaking, so before you start, I'd research Windows development more thoroughly - check you can't do it using the Windows APIs first, then have a look at the user-mode driver framework, then finally and only if you need to, look at the kernel level stuff.
I need to scan Wifi access point on Windows Mobile and connect the one of scanned results.
Currently I am using C# language, Windows Mobile 6.5 device, also to scan I am using the below code.
[DllImport(wlanapi.dll", SetLastError=true)]
I am using wlanapi.dll, but it seems that not possible to use on Mobile.
Does anyone know about the belows.
Could I use the dll in Windows Mobile 6.5 to scan and connect?
If the 1 is not possible, please let me know the different methods..
Please give me the clues.
wlanapi.dll doesn't exist in WinMo/WinCE. You have to use an API that is supported.
Most WinMo WiFi drivers (though probably not all) support the Wireless Zero Config (WZC) set of APIs. The native versions of these APIs, like WZCQueryInterface, are outlined in MSDN.
Microsoft does not provide any managed interface for these APIs, in fact the native documentation for them is pretty bad too. The definitive "example" of it's use is in the NETUI component source of Platform Builder. Gettign the eval version just for the source is very worthwhile if you plan to do much WinCE/WinMo development.
From a managed perspective I wrote an MSDN article back in '06 that talks about using the SDF for getting network info. The SDF has been reworked a lot since then, especially in the WZC area, but it's still pretty similar.
I did an updated blog post in '07 about custom-drawn ListBoxes, and while that's not what you're after, the data being displayed is wireless network info, which is in line with what you're after.
I have some ideas for improvements on my touchpad, ranging from the run of the mill scroll horizontally at the bottom, tapzones for right click, to more complicated ones. But I have no idea where to get started? I'm working on Windows 7 Home Premium, its an Asus laptop, and I have none of these options natively available to me. Regardless, I want to write something that anyone can use.
Where would I start?
(it'd be nice to write in c++? is that possible? what are the requirements here? what language would be recommended?)
This is dependent on the hardware and driver for the touchpad. Just because Windows 7 supports gestures and multitouch doesn't mean that your touchpad does automatically; assuming that the hardware supports it (doubtful), the driver has to be specifically updated to support it as well.
If you have none of the options available natively, you won't automagically get them just by upgrading to Windows 7.
If you plan on writing software that supports gestures or multitouch, you have no real option other than investing in the hardware as well. After all, how will you test your software without it?
Scrolling functionality such as you describe is handled in touchpad drivers, which are hardware specific. However, you may be able to accomplish what you want by using a hook. This is a mechanism by which you intercept and pre-process system messages before they're sent to applications. This could allow you to designate some areas of the touchpad for extra functionality without having to write a driver. But you're probably better off seeing if there is an existing driver with the functionality you want available from the ASUS site. If your laptop didn't come with Windows 7 originally, you're probably just running a generic driver and an actual touchpad specific driver might fix your problem.
I need to develop a print driver to print from any application into a TIFF file. Does someone know of resources or a good SDK vendor that would enable me to do that? Environment is Windows, any language.
The Microsoft Windows Driver Kit (freely available from the linked Microsoft site) has extensive documentation and examples on writing printer drivers. You can check the online printer driver page of the DDK docs before downloading it.
Edit: One commercial alternative that would probably be much quicker to deploy is VeryPDF's DocumentPrinter. It's rather pricy (currently $1500 for a developer license, $399 for a server license), but from what I've heard their support is rather good so if the price is tenable for you this may be a good option.
There's also a SDK from DirectConvert, but I couldn't find any pricing info and don't know anything about them.
Depending on your usage patterns, another option would be something like TechSmith SnagIt, which has printer capture facilities available. This is not a SDK, though.
Create a raster print driver using the Windows DDK. The sample they provide will do just fine. This will generate bitmaps, which can then be converted to TIFF using LibTiff. Your OEMSendPage function is where you'll want to convert the bitmap to TIFF and save it. If you're unfamiliar with the DDK and Windows print drivers, expect to spend quite a bit of time on this.
I have source for a driver I used to sell that does exactly what you want, but I stopped maintaining it after NT 4 so it's seriously out of date and would require some significant work to make it useful on modern Windows platforms.
As part of an application for a client, I need to have a section which reports temperature information (motherboard, CPU, HDD). I know there are standalone applications such as Hardware Monitor by CPUID, but again, these are standalone and I require something that I could interface with.
Is there any app like this which has an API or is open source so I can utilize their source code? I have language preferences other than it needs to run on Windows XP. Thanks.
You get info like this from WMI. Download WMICodeCreator to find the query as well as the code you need to write. Beware that hardware queries like this tend to rely heavily on providers supplied by the hardware or BIOS manufacturer.