[AD] problem with windows dialogs/ Win XP

[Daniel Sauder <daniel.sauder@xxxxxxxxxx>]

I'm new to this list, so hello. There's a problem with calling Windows 
dialogs from an allegro app with Windows XP (it is running fine with Win 
98). If you compile:

#include <allegro.h>
#include <winalleg.h>

int main(int argc, char **argv) {
   allegro_init();
   HWND h=win_get_window();
   install_keyboard();
   set_color_depth(16);
   set_gfx_mode(GFX_AUTODETECT_WINDOWED,640,480,0,0);

   set_gfx_mode(GFX_GDI,640,480,0,0);
  
   OPENFILENAME ofn;
   ofn.hwndOwner=h;
   
   memset(&ofn,0,sizeof(ofn));
   ofn.lStructSize=sizeof(OPENFILENAME);
   
   char szFile[260]="";
   ofn.nMaxFile=sizeof(szFile);
   ofn.lpstrFile=szFile;    
   
   ofn.lpstrFilter="Bitmaps\0*.bmp\0All Files\0*.*\0\0";
   
   if(GetOpenFileName(&ofn)!=0)
       MessageBox(NULL,ofn.lpstrFile,"",MB_OK);
   else
       MessageBox(NULL,"canceled","",MB_OK);
}
END_OF_MAIN()

... there are two problems: the Dialog appears behind the allegro main 
window and if you change the filetype the dialog shows no files until 
you change the directory.
For the first problem I didn't look for a solution yet.
For the second I commented out the call of _win_thread_init() in 
wsystem.c/sys_directx_init(), and it is working, thanks to Elias for 
helping me here.
_win_thread_init() can be found in wthread.c and loads the ole32.dll. I 
compiled one of my projects and it seems working nice with that change. 
So what is ole32 doing here? Is it effecting the stability of the system 
not using it? Since WinApi programming is new to me (I'm learning it 
since about 3 weeks) any comment might be useful.
Dan