How to write comments after self defined environment header

Question

I have defined an environment viz.Examples in the following way:

\newtheoremstyle{myexcstyle}{3ex}{3ex}{}{}{\scshape}{:}{.5em}{}
\theoremstyle{myexcstyle}
\newtheorem*{exmps}{Examples}
\newenvironment{Exmps}
{
    \begin{exmps}\
        \vspace{-1ex}
        \begin{enumerate}[label=\textbf{\arabic*}., itemsep=1.5ex]
        }
        {
        \end{enumerate}
    \end{exmps}
}

Now, at some point of my text, I started with a few examples after a defintion, then some theorems, and then I want to continue with the examples. In the second appearance of the Examples I want to make it look like "Examples (continued):". Precisely what am asking for is:

Definition:

Examples:

1.

2.

Theorem:

Examples (continued):

3.

4.

How do I achieve this?

Edit: An MWE:

\documentclass[openany]{book}
\usepackage{amsmath,amsfonts,amssymb,amsthm}
\usepackage{geometry}
\usepackage[inline]{enumitem}
\usepackage{mathtools}
\usepackage{thmtools}
\newtheoremstyle{myexcstyle}{3ex}{3ex}{}{}{\scshape}{:}{.5em}{}
\theoremstyle{myexcstyle}
\newtheorem*{exmps}{Examples}
\newenvironment{Exmps}
{
    \begin{exmps}\
        \vspace{-1ex}
        \begin{enumerate}[label=\textbf{\arabic*}., itemsep=1.5ex]
        }
        {
        \end{enumerate}
    \end{exmps}
}

\begin{document}
    \begin{Exmps}[continued]
        \item Example 3
    \end{Exmps}
\end{document}

Answer 1

Here you are. I slightly modified your code: needless to load amsfonts when you load amssymb , and amsmath when you load mathtools. Other problem: \textbf shouldn't be used with label=, because any reference to an item of of the list will be bolded and this is usually unwanted. It is better to set it via the key font=\bfseries.

\documentclass[openany]{book}
\usepackage{amssymb,amsthm}
\usepackage{geometry}
\usepackage[inline]{enumitem}
\usepackage{mathtools}
\usepackage{thmtools}
\usepackage{xifthen}
\newtheoremstyle{myexcstyle}{3ex}{3ex}{}{}{\scshape}{:}{.5em}{}
\theoremstyle{myexcstyle}
\newtheorem*{exmps}{Examples}
\newenvironment{Exmps}[1][]
{%
        \ifthenelse{\isempty{#1}}
    {\begin{exmps}}{\begin{exmps}[#1]}
        \leavevmode\vspace{-1ex}
        \begin{enumerate}[label=\arabic*., font=\bfseries, itemsep=1.5ex]
        }
        {
        \end{enumerate}
    \end{exmps}
}

\begin{document}

    \begin{Exmps}[continued]
        \item
        Example 3
    \end{Exmps}

\end{document}