Re: How to call a function from a dll created with d ?

[frame via Digitalmars-d-learn]

On Saturday, 2 July 2022 at 20:43:41 UTC, Vinod KC wrote:
But I got this error message.
dime.obj : error LNK2001: unresolved external symbol 
__D7dimedll12__ModuleInfoZ
dime.exe : fatal error LNK1120: 1 unresolved externals
Error: linker exited with status 1120

I tried the -H switch. You can't rely on that. I comment the 
lines that shouldn't be there - then it should work:

dimedll.di
```d
// D import file generated from 'dimedll.d'
module dimedll;
// import core.sys.windows.dll;
// import std.stdio;
// mixin SimpleDllMain!();
export void testFunc();
```

dimedll.d:
```d
module dimedll;

import core.sys.windows.dll;
import std.stdio;

mixin SimpleDllMain;

export void testFunc() {
    writeln("This is from dll");
}
```

app.d:
```d
module app;
import dimedll;

import std.stdio;
import std.stdio : log = writeln;

pragma(lib, "dimedll.lib");

void main() {   
   log("Lets build our own ime");
   testFunc();          
}
```

You should be able to change contents in the DLL and run the 
executable wihtout re-compiling (the library file should be round 
~2kB).

PS: ddemangle just waits for your input. You copy in the mangled 
symbol like `__D7dimedll12__ModuleInfoZ` and press enter ;-)