Questions tagged [interopservices]
84 questions
36
votes
6 answers
Could not load file or assembly 'System.Runtime.InteropServices.RuntimeInformation
I am getting this error whenever I try and run a webjob project with application insight and entity framework.
System.IO.FileLoadException: 'Could not load file or assembly
'System.Runtime.InteropServices.RuntimeInformation, Version=0.0.0.0,
…
Andrew
- 2,571
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16
votes
0 answers
Modifying a C struct in VB.NET
I'm trying to use someone else's DLL coded in C in my VB.NET application.
My VB.NET application sends some callbacks pointers to the DLL and DLL then calls back to functions inside my VB.NET application.
The DLL is calling a function inside VB.NET…
Messias
- 161
- 3
5
votes
1 answer
Pass function pointer into a DLL from PowerShell
Problem
I have a DLL with the following function exported.
extern void Finalize(void (*WriteEntry)(const char* entry));
I am using P-Invoke to call into the DLL from PowerShell.
In PowerShell scripts, I have a function WriteEntry defined, which I…
brandon_busby
- 122
- 11
5
votes
2 answers
What is IExpando and where is it used?
I was browsing the types in mscorlib using reflector (like you do...) and came across the IExpando interface, in the System.Runtime.InteropServices.Expando namespace.
I did a search in reflector and even checked out MSDN, it seems that no types in…
fletcher
- 13,380
- 9
- 52
- 69
5
votes
1 answer
VBA array of User-Defined objects from a C# DLL
Background information:
I'm building a SCADA system, which runs on VBA and I seek some of the powers of C#. I build a DLL library in C# and got basic data to flow between the DLL and VBA.
[ComVisible(true),…
Rasmus Plats
- 51
- 5
5
votes
2 answers
How do I use an unregistered dll from c#?
I have a custom dll (not registered) that I need to access via c#. How do I do this without registering the DLL?
Edit: It is a C++ dll.
cabgef
- 1,398
- 3
- 19
- 35
5
votes
1 answer
Windows Service fails to start interactive process on user log on with WTSQueryUserToken for some versions of Windows
Following this link, I have implemented WTSQueryUserToken in my C# solution and called the CreateProcessAsUserWrapper.LaunchChildProcess("app_path") method from the OnStart of my Windows Service which is made to run as "LocalSystem". It is able to…
TrueD
- 75
- 2
- 10
4
votes
1 answer
Interfacing with C/C++ routine in C# causes rip
I have a vendor's API call, which I want to use in my C# Windows Forms application. The problem is that no matter what P/Invoke I try, I get a crash on the line stating that the call has unbalanced the stack. I tried working with the vendor, but…
Sarah Weinberger
- 15,041
- 25
- 83
- 130
3
votes
1 answer
How to run bundled javascript files in blazor web assembly?
I have kept the bundled script files in wwwroot folder of blazor_wasm app.
I added the file using script tags in index.html
Shruti
- 109
- 9
3
votes
1 answer
Dynamic memory allocation in native dll
I have a native (unmanaged) .dll written in C++ that is to be called from a managed process (a C# program). When debugging the dll the problem I have has shown to be that when I create an object in the dll with the new keyword I get a System Access…
skitiddu
- 31
- 4
3
votes
1 answer
How to convert IntPtr to SafeHandle?
I have C# Windows service class:
class MyService : ServiceBase
{
private void InitializeComponent() {
//some other code ...
SafeHandle sHandle = this.ServiceHandle; // I want to do this but this fails.
…
Arnoj
- 79
- 8
3
votes
1 answer
GetWindowText() function is not executing correctly at all times
I'm writing a small application where I wish to get the URL from the Chrome browse.
In order to first check if the Chrome browser is open or not I use the following code:
IntPtr WindowTitleTextPtr = GetForegroundWindow();
StringBuilder…
HaggarTheHorrible
- 7,083
- 20
- 70
- 81
3
votes
2 answers
How convert const wchar_t* from C DLL to C# string automatically
It is just a curiosity. Perhaps there is a person in this world who did such things:
I have to export C function and load it from C# code via DllImport
const wchar_t * SysGetLibInfo() {
return dllmanager.SysGetLibInfo();
}
The best things to do…
Mnt DXM
- 168
- 1
- 7
2
votes
2 answers
How to marshall as the I8 type with PInvoke?
I have a UInt32 value I want to pass to an external dll using InterOpServices.
The prototype for the unmanaged code is:
[DllImport("svr.dll")]
public static extern UInt32 CreateTag (
[MarshalAs(UnmanagedType.LPStr)] String Name,
Object…
bentaisan
- 1,056
- 3
- 12
- 29
2
votes
0 answers
'Invalid FORMATETC structure' C# while drag and drop
I am trying to convert the dataObject's data to CF_HDROP format when a drag operation starts. I was able to read the byteArray, which I will store at some point, but for now I am hard-coding the path to a file that actually exists on my drive.
I…
Amzraptor
- 161
- 3
- 11