I would like to be able to hide another application's window from the taskbar, without hiding the window itself. Specifically, I want to have several different Web browsers running, visible, available in the Alt+Tab list, but not taking up space on the taskbar. (If anyone's curious why: I've written a dashboard app that uses Vista's Dwm...
Hello, How do I call WSAGetLastError() from WinAPI so I get the valid text error? ...
I have a piece of .NET code which I want to port to 64-bit. The codes basically is a set of P/Invoke calls to some other C dll. One of the functions in the C dll has a parameter 'size_t'. What datatype should I use in my P/Invoke signature so that the marshalling works fine. I was thinking of using a IntPtr or a UIntPtr but some say that...
I have the following C code: const BYTE* Items[3]; Items[0] = item1; Items[1] = item2; Items[2] = item3; int result = Generalize(3, Items); with Generalize having a signature of int __stdcall Generalize(INT count, const BYTE * const * items); What is the best way to make that call with PInvoke? ...
How do I declare in C# a C function that returns a pointer to a structure? I believe following is one way to do that, followed by Marshal.PtrToStructure to get actual structure value. // C-function SimpleStruct * Function(void); // C# import [DllImport("MyDll.dll")] public static extern IntPtr Function(); Am I correct about that? A...
How to lock the screen (most important), change the sound, lock the keyboard and etc using VB.NNET? I know it's quite easy to do it using C++ .Net ...
This question is along the same lines as Retrieving Device Context from .NET print API... I have a Datacard 295 embosser / mag stripe encoder. In order to write to the Mag Stripe or Embosser wheel, you must write your text in a special "pseudo-font", which the printer driver will recognize and handle appropriately. There are multiple ...
I have a c++ dll which exposes the following function long func(struct name * myname) { strcpy(myname->firstname,"rakesh"); strcpy(myname->lastname,"agarwal"); return S_OK; } struct name { char firstname[100]; char lastname[100]; } I want to call this function from a C# application , so I do the following : [S...
I have a function in unmanaged C/C++ code (dll) that returns a structure containing a char array. I created C# struct to receive this return value uppon calling the function. And uppon calling this function i get 'System.Runtime.InteropServices.MarshalDirectiveException' This is C declaration: typedef struct T_SAMPLE_STRUCT { int num; ...
I'm working on a PInvoke wrapper for a library that does not support Unicode strings, but does support multi-byte ANSI strings. While investigating FxCop reports on the library, I noticed that the string marshaling being used had some interesting side effects. The PInvoke method was using "best fit" mapping to create a single-byte ANSI...
** MAJOR UPDATE ** I made a minor mistake but I'm still curious about exactly what is happening. The function I am calling is actually "fooV", a function with this signature: foo(const char *, const char *, EnumType, va_list) This clears up the AccessViolationExceptions I was getting, but doesn't explain why params parameters work fo...
I am trying to pass a structure from C# into C++ library. I pass structure as an object, and C++ function expects it as a pointer (void *). I am having problem passing the structure. [DllImport("MockVadavLib.dll", CharSet = CharSet.Ansi)] public static extern IntPtr TheFunction([MarshalAs(UnmanagedType.LPStruct)] UserRec userRec); ...
Good afternoon, i am currently wrestling with an old .dll which functionality I have to re-use in a .Net application & I came so far to import the basic/easy functions/methods that return bool etc, but some do in fact also expect (or return) an type that is declared within the .dll. How would I handle this? How would I map/create that ...
Hey all, I'm trying to call the HtmlTidy library dll from C#. There's a few examples floating around on the net but nothing definitive... and I'm having no end of trouble. I'm pretty certain the problem is with the p/invoke declaration... but danged if I know where I'm going wrong. I got the libtidy.dll from http://www.paehl.com/open_s...
Recently I tried to use p/invoke in mono (.NET for Linux platform) to write a simple OpenGL application to find out how it works on C# (I've already sucessfully done it on windows). I heard about the tao framework, but I don't want everything for a simple "hello world" like program. I just stucked at the start. I p/invoked some GL funct...
Due to a limitation in the .NET EventLog class, I have some code using PInvoke that logs to the Application log. The code works without a problem. But now, I'd like to log to a custom event log. So, I tried changing the 2nd parameter of the RegisterEventSource to "companyX" (my custom log). It correctly wrote to "companyX" (instead of t...
I am about to begin reading tons of binary files, each with 1000 or more records. New files are added constantly so I'm writing a Windows service to monitor the directories and process new files as they are received. The files were created with a c++ program. I've recreated the struct definitions in c# and can read the data fine, but I'm...
I have been working on this for a few days and this is doing my head in: Our application is built using the .NET Compact Framework 2.0 and running on Windows Mobile 5 & 6 devices. We can set the WLAN connection of the device programmatically using the Wireless Zero Config functions (described here: msdn.microsoft.com/en-us/library/ms89...
I'd like to change the BackgroundColor of a ListViewSubItem in a ListView in Windows Mobile. I'm using the Compact Framework ListView, whose ListViewItems only allow setting the BackColor on the entire row, which I don't want. I have two questions: Is this possible? If this is possible, I know I have to P/Invoke to get this to work (...
***Platform: in Vista(ultimate or home/premium) it does not work, other OS(xp, windows7) it works****** I'm emptying recycle bin using c++.net(or c#.net) inside a thread. When i do this straight (without thread) it works. But if thread used it doesn't. Please watch the code snippet below: namespace EmptyRecycleBin_C{ enum RecycleFlags ...