[Mingw-users] Problem calling a dll together with MessageBox

[<ren...@zk...>]

Problem calling a dll together with MessageBox
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Hi

I am having a problem calling (or using) a DLL together with
the MessageBox API call. The problem goes away when I use
printf instead of MessageBox.

Here are the test files to reproduce it:

prog.c:
-------
#include <windows.h>

//#define WORKS


int main(int argc, char **argv, char **env) {

  HANDLE dll =3D LoadLibraryEx("theDll.dll", 0, 0);

  if (!dll) {
     #ifdef WORKS
       printf("Nope\n");
     #else
       MessageBox(0, "Nope", 0, 0);
     #endif
  }
  else {
     #ifdef WORKS
       printf("Yepp\n");
     #else
       MessageBox(0, "Yepp", 0, 0);
     #endif
  }
}


dll.c
-----

#include <windows.h>

DllMain(HANDLE hModule,
        DWORD  fdwReason,
        LPVOID lpvReserved)
{

  MessageBox(0, "DllMain", "DllMain", 0);
  printf("DllMain\n");


  switch (fdwReason) {
    case DLL_PROCESS_ATTACH:
    break;

    case DLL_PROCESS_DETACH:
    break;

    case DLL_THREAD_ATTACH:
    break;

    case DLL_THREAD_DETACH:
    break;

    default:
    break;
  }
  return TRUE;
}
---

I compile the files like so:

gcc -mdll -otheDll.dll  dll.c
gcc       -otheProg.exe prog.c

and execute then theProg.exe from cmd.


I am probably missing a flag such as -mwindows or so, but
including this flag didn't help either. Does someone have
a hint as to what I am doing wrong.


Thanks,
Ren=E9
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