pinvoke

问题 I want to be able to perform lens magnificaiton on top of the windows taskbar. So far I've been unsuccessful in implementing this seeing as the taskbar will always open on top of my window. Windows built-in magnifier is able to do this so I'm hoping it is indeed possible. I've attached two screenshots showing Windows built-in magnifier and how it is able to magnify the taskbar and how my application will render below the taskbar. Windows built-in Magnifier: My application: Is there any way to

问题 Receiving System.TypeLoadException in runtime. I use code from third-party source to define structs and p-invoke external methods. I found the full code online in this link. In the code there are some structs with union, using FieldOffsetAttribute(0) on multiple fields. when I try to use some of the structs I get an exception: Could not load type 'NET_DVR_SLAVE_CHANNEL_UNION' from assembly 'ClassLibrary1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' because it contains an object

问题 Background: I have written the following function in C++: extern "C" __declspec(dllexport) int test(const char*, ...); And I am using P/Invoke to call it from C#: [DllImport("foo/bar.dll", EntryPoint = "test")] public static unsafe extern int __unmanaged__test(byte* buffer, __arglist); Problem: I need to initialize the __arglist dynamically, meaning that I have an Array<object> , which I have to convert into the __arglist before calling the C++-function. I have tried the following, but it

问题 My question has to do with trying to call a function written in C from C#. I've looked in a header file that came with the C library to understand the functions as they exist in the C dll. Here's what I see: C code (for a function called "LocGetLocations"): typedef enum { eLocNoError, eLocInvalidCriteria, eLocNoMatch, eLocNoMoreLocations, eLocConnectionError, eLocContextError, eLocMemoryError } tLocGetStatus; typedef void *tLocFindCtx; typedef void *tLocation; PREFIX unsigned int POSTFIX

问题 I am triggering my managed code and initiating a call to unmanaged code. There is a callback in unmanaged code. From unmanaged I am getting callback in my managed method 'DelegateMethod'. But I am not getting proper parameter/argument values from unmanaged code. Please help me with this using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.InteropServices; namespace TestApp { public class Program { public delegate void fPointer(byte[]

问题 I am triggering my managed code and initiating a call to unmanaged code. There is a callback in unmanaged code. From unmanaged I am getting callback in my managed method 'DelegateMethod'. But I am not getting proper parameter/argument values from unmanaged code. Please help me with this using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.InteropServices; namespace TestApp { public class Program { public delegate void fPointer(byte[]

问题 I have a native C++ library (static i.e. .lib target). I wish to use some of the functions in this file in my C# projects. For dlls, I could pinvoke them. How do I do this for static libraries? I read this question and there David's answer says you can pinvoke only for dlls and not for libs. 回答1: A static library is used by linking it into a larger module. In Windows that means a DLL or an executable. They do not stand alone and only make sense when you link them into a larger module. So,

问题 I'm writing a helper for injecting touch in UI-tests using InjectTouchInput. The injected touch works fine but injecting mouse input after touch does not work. Mouse.Click(point); // works Touch.Tap(point); // works Mouse.Click(point); // does not work, mouse cursor no longer visible on screen. Calling GetCursorInfo() reveals that cursor is CURSOR_SUPPRESSED and I have not found a way to restore it. Moving the physical mouse brings back the cursor and clicking things work fine. How can I

问题 I'm writing a helper for injecting touch in UI-tests using InjectTouchInput. The injected touch works fine but injecting mouse input after touch does not work. Mouse.Click(point); // works Touch.Tap(point); // works Mouse.Click(point); // does not work, mouse cursor no longer visible on screen. Calling GetCursorInfo() reveals that cursor is CURSOR_SUPPRESSED and I have not found a way to restore it. Moving the physical mouse brings back the cursor and clicking things work fine. How can I

问题 So I have a console application and I've imported RegisterRawInputDevices from user32.dll You can't register a device onto the console window handler, so I've created a class that inherits from Form. This is also the class that overrides WndProc. Right now all I'm having it do is write message.Msg to the console. So I instantiate the form and pass the window handler to RegisterRawInputDevices where it registers the mouse and keyboard. But after that the window no longer receives any messages.