on its own thre is not problem, but add a param that is an alias or struct and bit and int clash .... false is a bit (well boolean [but enough said about that) and never an int ????

--------- bittest.d -----------
module bittest;

import std.c.stdio;
import std.c.windows.windows;

struct name_space {
static void func( COLORREF col, int len ) {
printf( "func(int)\n" );
}
static void func( COLORREF col, bit cor ) {
printf( "func(bit)\n" );
}
}


int main( char[][] args ) {
name_space.func( 0, true );
return 0;
}


/*
bittest.d(17): function func overloads void(uint col,int len) and void(uint
col,bit cor) both match argument list for func
*/
----------------------------------
there is a little err in the error msg ... inout appears in the wrong place ...
-------- bitlib.d -----------
module bitlib;

import std.c.stdio;
import std.c.windows.windows;

struct name_space {
static void func( COLORREF col, inout RECT r, int len ) {
printf( "func(int)\n" );
}
static void func( COLORREF col, inout RECT r, bit cor ) {
printf( "func(bit)\n" );
}
}


int main( char[][] args ) {
RECT r;
name_space.func( 0, r, true );
return 0;
}

/*
bitlib.d(18): function func overloads void(uint colinout ,RECT r,int len) and
void(uint colinout ,RECT r,bit cor) both match argument list for func
*/

--------------------------
Mike.