Dialog toolbar pressed and unpressed

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C++

MFC

i have tool bar on the dialog how when clicking on button in tool bar it should be pressed and clicking again the it should be unpressed. this is a dialog onupdate is not calling in sdi we can do it through onupdatecommand how to do in dialog. please let me know.

how i will get whether it is pressed and unpressed and while pressing it should show like pressed.

What I have tried:

m_IsLineEnabled = !m_IsLineEnabled;