Is there a manual (mouse click) way to on/off in sequencers?

[nzausrec]

I'm a mic-up guy and am curious about sequencers and midi. Do these programs, like Cubase/Cakewalk etc, have a manual way to enter notes into a sequencer, rather than having a remote keyboard to enter on/off?
Some software drum machines have sequencers that activate their notes with a mouse click. Are sequnces in these programs the same? Or do they only work by midi keyboard?

 

[tourettes5139]

Yup. Piano roll in Cubase, and I'm sure there are other similar things in other programs.

 

[studiomaster]

Yup...there are piano rolls,drum lanes and many more. but work will be much more longer and exhausting if u are going to write the notes using the pencil tool.