I'm using p/invoke to call EnableScrollBar from user32.dll (MSDN reference). I noticed that when the scrollbar is enabled, it seems to draw as though no theme is applied and then re-drawn with the theme applied. I've only tested with Windows 7 so far. Is there any way to stop this from happening? EDIT: Here's some code to show what hap...
Hello, I'm working on Windows 7 with Visual Studio 2008. I have a .NET assembly that makes calls into a native DLL with P/Invoke. I have set up a separate .NET unit test project in my Visual Studio solution that tests the assembly by making various calls into it. However, when the unit test makes a call into the assembly, and the ass...
I'have the following situation: I have a delphi dll (unmanaged) that works. I have a win forms application (a proof of concept application) that works. The dll (and all its dependencies) are copied in the Bin/Debug directory of the application. I've createad a .NET managed library which has a class that is a wrapper around the dll. all...
Please bear with me as i am new to marshalling. I have a C structure and function declared as the following: typedef struct { char* name; BT_ADDR address; } DeviceList; extern "C" _declspec(dllexport)DeviceList* PerformQuery(); The BT_ADDR structure is the same structure defined in wsbth2.h in Win CE SDK. PerformQuery return...
So I'm trying to get the right Device Context so I can set the gamma ramp on individual monitors in an N monitor configuration (2+). I've tried [DllImport("gdi32.dll")] static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, IntPtr lpInitData); With this method I'm using the string "DISPLAY" for lpszDr...
Microsoft released Security Advisory (2269637) Insecure Library Loading Could Allow Remote Code Execution. The note refers to a tool that will help to detect this problem and programming guidelines on Dynamic-Link Library Security. How do these guidelines translate to .NET development? I assume this only affects Platform Invoke. Does...
I'm using C# for WinForms app in VS2010 and I needed to create a directory in which the path was too large for the .NET methods (248 char limit, I believe) and ran across suggestions from google to use the Unicode Win32 CreateDirectory(). I had initially tried calling it using Unicode and passed parameters but after several failed attem...
I am trying to do something like this in C#. I found out how to call Win32 methods from C# using P/Invoke from this link. However I met some difficulties in implementing P/Invoke. For example, one of the methods that I would like to access is PdhOpenQuery, signature: PDH_STATUS PdhOpenQuery( __in LPCTSTR szDataSource, __in DWO...
I'm using GetTokenInformation with the TokenGroups flags to retrieve all the groups that a particular token is part of. I'm then looping through each of the returned SIDs and using LookupAccountSid to grab the user name and domain. I call LookupAccountSid twice: the first time to grab the size of the name and domain character arrays and ...
The following code exists in LogEntry.cs in the Enterprise Library's Logging Application Block: private bool UnmanagedCodePermissionAvailable { get { if (!unmanagedCodePermissionAvailableInitialized) { // check whether the unmanaged code permission is available to avoid three potential stack walks bool internalUn...
In accessing PDH.dll (a Win32 API) (see link) using P/Invoke, it turns out that I need access to several constants and structs. I found these are defined inside a file PDH.h. How do I access these defines and structs? Do I have to rewrite them with C#? Is there another way? ...
Hi, I have a C# application which is using a third party (closed source) native DLL through p/invoke. During some of these calls, the DLL will allocate memory using operator new / operator new[] and return a pointer to use for reading the results. This memory is never freed by the DLL after being allocated and returned. How can I perfo...
Hi, I have written a structure in VC++. I have made a dll of the VC++ code and calling this dll in C# using PInvoke. The VC++ dll looks like this #include <windows.h> #include <stdio.h> #include <conio.h> #include <tchar.h> #include <iostream> #if defined(_MSC_VER) #include <windows.h> #define DLL extern "C" __declspec(dllexport) #els...
Currently, we use an unmanaged DLL from a vendor that allows us to access a particular instrument. The particular function of interest is specified in a header file as this: extern "C" short CCONV acq_get_board_count (); In my application, I have the pinvoke statement: public class bograms { [DllImport("bograms.dll", EntryPoint =...
My gut reaction is no, because managed and unmanaged memory are distinct, but I'm not sure if the .NET Framework is doing something with Marshaling behind the scenes. What I believe happens is: When getting a struct from my unmanaged DLL, it is the same as making that call gets an IntPtr and then uses it and the Marshal class to copy th...
Im using an P/invoke on an unmanaged dll function swe_calc_ut. int swe_calc_ut(double tjd_et, int ipl, int iflag, double *xx, char *serr) Parameter xx is meant to be an "array of 6 doubles for storing the result", and parameter serr a "character string to return error messages" my c# code is as follows. [DllImport("swedll32.dll")]...
Im using P/invoke on an unmanaged dll function swe_get_planet_name() in C#. The given function definition is, char* swe_get_planet_name(int ipl, char *spname); This means the return value is assigned to char *spname? It seemed so from the sample code in the documentation. char snam[40]; /* * get the name of the planet p ...
Does anyone know how to use the RegisterHotKey/UnregisterHotKey API calls in a console application? I assume that setting up/removing the hotkey is the same, but how do I get the call back when the key was pressed? Every example I see is for Winforms, and uses protected override void WndProc(ref Message m){...}, which isn't available...
I'm working already a good time with the .net framework. In this time there were some situations, I used P/Invoke for doing things that I couldn't do with managed code. However I never knew exactly what the real disadvantages of using it were. That was also the reason why I tried not to use it as far as possible. If I google, then I f...
I have the following code (VB.NET) which is designed to determine if a given account name refers to a local group or a user account. This will only be called for accounts/groups on a machine, not a domain. Module netapi Private Declare Function NetUserGetInfo Lib "Netapi32.dll" ( _ ByVal ServerName As String, _ By...