dllimport

Hopefully this is a brainlessly easy question, but it shows my lack of expertise with C++. I'm a C# programmer, and I've done extensive work with P/Invoke in the past with other people's C++/C dlls. However, this time I've decided to write a wrapper C++ dll (unmanaged) myself, and am then calling my wrapper dll from C#. The problem I am immediately running into is that I am unable to define a C++ function that can be found by p/invoke. I don't know what the syntax for this is, but here's what I'm trying so far: extern bool __cdecl TestFunc() { return true; } Originally I simply had this, but

I am using DllImport in my solution. My problem is that I have two versions of the same DLL one built for 32 bit and another for 64 bit. They both expose the same functions with identical names and identical signatures. My problem is that I have to use two static methods which expose these and then at run time use IntPtr size to determine the correct one to invoke. private static class Ccf_32 { [DllImport(myDllName32)] public static extern int func1(); } private static class Ccf_64 { [DllImport(myDllName64)] public static extern int func1(); } I have to do this because myDllName32 and

We have a supplier who provides a library for access to their hardware. Unfortunately, if you have multiple devices, you need to import their library multiple times, with different dll names. As a consequence, we have a metric ton of duplicated code, and I'm worried that it will soon become be a maintenance nightmare. What we have at the moment is somthing like: namespace MyNamespace { public static class Device01 { public const string DLL_NAME = @"Device01.dll"; [DllImport(DLL_NAME, EntryPoint = "_function1")] public static extern int Function1(byte[] param); ... [DllImport(DLL_NAME,

My goal is to fill in Dll's import table manually in order to hook internal LoadLibrary calls (when you load library it may load another library inside its DllMain). Here is my code which fill in Import table recursively for each dll in dependecies hierarchy and it works fine except some dlls ( api-ms-win-crt-locale-l1-1-0.dll in this case). void PEUtility::fillImportTable(HMODULE loadedModule, FillImportFlag flag, std::function<void(HMODULE&)> callback) { std::stack<HMODULE> modules; modules.push(loadedModule); while (modules.size()) { auto module = modules.top(); modules.pop(); auto