if( Menu.mOpt[12].nopt > 0 )//vjump this->PushToConsole( "DuckDownCamOffset 800" ); else this->PushToConsole( "DuckDownCamOffset 0");
this->AddItemToMenu("V Jump up" ,1,0); // this is the Menu.mOpt[12]
bool vjump=false;
your code code code...
if( Menu.mOpt[12].nopt > 0 )
{
if(vjump==true){ptc(vjumpcommand); vjump=!vjump;}
}

Get Menu hack Status
Proof if menu hack status is the same as your variable
(e.g. menu: nxchams=1 your var: nxchams=0 then you have to change your hack)
change your variable status
Proof if you Menu settings get changed since the last proof
if it does change your hack status
and change your variable status

) tutorial!