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 Code: CommandLineToArgvW

PWCHAR*
    CommandLineToArgvW(
        PWCHAR CmdLine,
        int* _argc
        )
    {
        PWCHAR* argv;
        PWCHAR  _argv;
        ULONG   len;
        ULONG   argc;
        WCHAR   a;
        ULONG   i, j;

        BOOLEAN  in_QM;
        BOOLEAN  in_TEXT;
        BOOLEAN  in_SPACE;

        len = wcslen(CmdLine);
        i = ((len+2)/2)*sizeof(PVOID) + sizeof(PVOID);

        argv = (PWCHAR*)GlobalAlloc(GMEM_FIXED,
            i + (len+2)*sizeof(WCHAR));

        _argv = (PWCHAR)(((PUCHAR)argv)+i);

        argc = 0;
        argv[argc] = _argv;
        in_QM = FALSE;
        in_TEXT = FALSE;
        in_SPACE = TRUE;
        i = 0;
        j = 0;

        while( a = CmdLine[i] ) {
            if(in_QM) {
                if(a == '\"') {
                    in_QM = FALSE;
                } else {
                    _argv[j] = a;
                    j++;
                }
            } else {
                switch(a) {
                case '\"':
                    in_QM = TRUE;
                    in_TEXT = TRUE;
                    if(in_SPACE) {
                        argv[argc] = _argv+j;
                        argc++;
                    }
                    in_SPACE = FALSE;
                    break;
                case ' ':
                case '\t':
                case '\n':
                case '\r':
                    if(in_TEXT) {
                        _argv[j] = '\0';
                        j++;
                    }
                    in_TEXT = FALSE;
                    in_SPACE = TRUE;
                    break;
                default:
                    in_TEXT = TRUE;
                    if(in_SPACE) {
                        argv[argc] = _argv+j;
                        argc++;
                    }
                    _argv[j] = a;
                    j++;
                    in_SPACE = FALSE;
                    break;
                }
            }
            i++;
        }
        _argv[j] = '\0';
        argv[argc] = NULL;

        (*_argc) = argc;
        return argv;
    }

From http://alter.org.ua/en/docs/win/args/

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