Change Window/Taskbar Icon using hardcoded one?

Okay, I've sussed it!

In 'BRL.dxgraphics.mod/d3d7graphics.bmx' @ line 49
(Thanks to 'Ed From Mars' for this one)

Function CreateHWND(width,height,fullscreen)

    Local style,ex_style,hwnd
    Local hinst=GetModuleHandleA(0)
    
    Global wndClas
    
    If Not wndClas
        Local wc:WNDCLASS=New WNDCLASS

        wc.hIcon=LoadIconA(hinst,Byte Ptr(101)) ' Added by yan

        wc.hInstance=hinst
        wc.lpfnWndProc=WndProc
        wc.hCursor=LoadCursorA( Null,Byte Ptr IDC_ARROW )
        wc.lpszClassName=DX_CLASS_NAME
        wndClas=RegisterClassA( wc )
        If Not wndClas
            Throw "Failed to register window class"
        EndIf
    EndIf

    Local wndTitle:Byte Ptr=AppTitle.ToCString()

    If fullscreen
        style=WS_VISIBLE|WS_POPUP
        hwnd=CreateWindowExA( 0,DX_CLASS_NAME,wndTitle,style,0,0,width,height,0,0,hinst,Null )
    Else
        style=WS_VISIBLE|WS_CAPTION|WS_SYSMENU
        Local rect[]=[0,0,width,height]
        AdjustWindowRect rect,style,0
        width=rect[2]-rect[0]
        height=rect[3]-rect[1]        
        hwnd=CreateWindowExA( 0,DX_CLASS_NAME,wndTitle,style,CW_USEDEFAULT,CW_USEDEFAULT,width,height,0,0,hinst,Null )
    EndIf
    MemFree wndTitle
    If Not hwnd Throw "Failed to create window"
    Return hwnd
End Function

In 'BRL.GLGraphics/glgraphics.win32.c' @ line 144

static void _initWndClass(){
	static int _done;
	if( _done ) return;
        WNDCLASS wc={0};
	wc.style=CS_HREDRAW|CS_VREDRAW|CS_OWNDC;
	wc.lpfnWndProc=(WNDPROC)_wndProc;
	wc.hInstance=GetModuleHandle(0);
	
	wc.hIcon=LoadIcon(GetModuleHandle(0),(const char*)101); //Added by yan
	
	wc.lpszClassName=CLASS_NAME;
	wc.hCursor=(HCURSOR)LoadCursor( 0,IDC_ARROW );
	wc.hbrBackground=0;//(HBRUSH)GetStockObject(BLACK_BRUSH);
	if( !RegisterClass( &wc ) ) exit(-1);
	_done=1;
}

All should be working now after a build mods.