Console Executable that calls WinDLL.dll with "D's" loader:

/+******************************************************
 * Program       : Main_Loader.exe
 * Source        : Main_Loader.d
 * Author        : David L. 'SpottedTiger' Davis
 * Created Date  : 13.Jun.04 Compiled and Tested with dmd v0.93
 * Modified Date : 08.Jul.04 Compiled and Tested with dmd v0.95 
 *               : 22.Jul.04 Compiled and Tested with dmd v0.96
 *               : 22.Dec.04 Corrected mistakes in code and then
 *               :           Compiled and Tested with dmd v0.109
 *               : 28.Feb.05 Compiled and Tested with dmd v0.114
 *               : 06.Jun.06 Compiled and Tested with dmd v0.160
 *               : 10.Jan.07 Compiled and Tested with dmd v1.0
 *               :
 * Requirements  : std.loader, std.string, and std.stdio
 *               :
 * License       : Public Domain 
 *******************************************************************
 * Note: This is an example of using the std.loader to pull in a Win32
 *       DLL into memory, and then using the free functions within it.
 *
 * Example of using WinDLL.dll's imported functions
 * To Compiled: C:\dmd\MKoD_ex>dmd Main_Loader.d
 +/
private import std.loader;
private import std.stdio;
private import std.string;

// set up pointers to the free functions - default parameter work fine!
typedef bool ( *pfn_isroman )( in dchar );
typedef bool ( *pfn_isromanstr )( in char[] );

int main ( in char[][] args )
{
    HXModule hLibWinDLL = null; 
    char[]   sLibName   = "";  
    char[]   sPath      = "";

    sPath = args[0][ 0 .. std.string.rfind( args[ 0 ], r"\" ) ].dup;
    sLibName = sPath ~ r"\WinDLL.dll";
    
    // Load DLL
    hLibWinDLL = ExeModule_Load( sLibName );
    
    writefln("\"%s\" is loaded, hLibWinDLL=%X", sLibName, cast(int)hLibWinDLL );
 
    pfn_isroman    isroman    = cast(pfn_isroman)ExeModule_GetSymbol( hLibWinDLL, "isroman" );
    pfn_isromanstr isromanstr = cast(pfn_isromanstr)ExeModule_GetSymbol( hLibWinDLL, "isromanstr" ); 

    //Currently it appears the char / dchar aren't pass correctly, 
    //so the answer is always wrong. I need to check into this more.
    //---------------------------------------------------------------
    //writefln( "Testing isroman(\'%s\') = %b", 'C', isroman( 'C' ) ); 
    writefln( "Testing isromanstr(\"%s\") = %b", "MMVC", isromanstr( "MMVC" ) );
    writefln( "Testing isromanstr( \"%s\" ) = %b", "ABCDEF", isromanstr( "ABCDEF" ) );
 
    // Unload DLL
    ExeModule_Release( hLibWinDLL );

    return 0;

} // end int main( in char[][] )

C:\dmd\MKOD_ex>..\bin\dmd main_loader.d
C:\dmd\bin\..\..\dm\bin\link.exe main_loader,,,user32+kernel32/noi;

C:\dmd\MKOD_ex>main_loader
"C:\dmd\MKOD_ex\WinDLL.dll" is loaded, hLibWinDLL=10000000
Testing isromanstr("MMVC") = 1
Testing isromanstr( "ABCDEF" ) = 0

C:\dmd\MKOD_ex>