Menu change state

Hello

I ve tried to look up my problem but unfortunately no result found so far.

I am aiming for changing the menu button state from checked to unchecked as I click it...

I tried already

DWORD CheckMenuItem( HMENU hmenu,
UINT uIDCheckItem,
UINT uCheck
);

LRESULT SetButtonState(const long &);

Instead of the red text should be other arguments these are those which MS Visual studio offers me...

Do you have an idea what else shall I use or in which different way to use these?

Thank you for patience

CheckMenuItem should do the trick I think. uCheck is the argument where to specify if it should be checked or unchecked.
Been a while since I messed around with menus.

thx works