to!string and windows programming

[Phil Lavoie]

Yo,

I am currently going through the much recommended book 
"Programming Windows" and experiencing some stuff. One of which 
was formatting the hInstance and prevHInstance into a string. 
WHICH CRASHES THE PROGRAM! I hope I am doing something wrong! 
Please scope the code below and let me know either the reason + 
workaround for this misbehaviour or what is my mistake!

import std.stdio;


version( Windows ) {
   import std.c.windows.windows;
   import std.string;
   import std.conv;

   extern( Windows )
   int WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR 
szCmdLine, int iCmdShow) {
     //size_t noInstance = cast( size_t )hInstance;
     void * vp = null;
     size_t noInstance = cast( size_t )vp;
     string noInstanceS = to!string( noInstance ); //This line 
crashes
     /*
     MessageBoxA(
       null,
       //toStringz( "HInstance: " ~ to!string( hInstance ) ~ 
"\nHPrevInstance: " ~ to!string( hPrevInstance ) ),
       toStringz( "Hello" ),
       toStringz( "HelloIsMe" ),
       0
     );
     */


     return 0;
   }

} else {
   import std.conv;

   void main( string[] args ) {
     void * vp = null;
     size_t vpInt = cast( size_t )vp;
     writeln( "VP: ", to!string( vpInt ) ); //Here it does not.
   }

}

Regards!

Phil