Windows 7: Will format the hard drive [D & C drive], delete the all file in it?

I need to format my hard drive [D & C drive]

so i wanna know Will format the hard drive [D & C drive], delete the all file
in it? Like the software that i install [ C:\Program Files], will they remain there or
will be deleted?









i already make a back up to all my Document project [ on D drive as i shown above] but to be honest, i dont want the process to delete my " Program Files" folder [ C:\Program Files]& my Document project [ on D:drive]........


** I just reinstall my pc 4/5 days ago [ maybe on 20 or 21/3/2012 ]

Formatting a drive or partition will completly wipe it, delete everything.

Take note you will be unable to format a drive with Windows on it if you are using that installation, you need to use a boot disk. If using dual boot you can format one Windows drive from the other.

Thanks for the fast reply