When you install Windows you'll come to a screen that gives you a choice between "Upgrade" and "Custom (advanced)" install options. If you select the "Custom (advanced)" option then the very next screen will present you with a list of drives to install on.
If the entire SSD shows as "unallocated space", then simply selecting that drive and clicking the "Next" button will cause Windows to partition the entire drive and format it as NTFS before installing.
If the SSD already has partitions and you want to delete them so you can start from scratch, then click the "Drive options (advanced)" link in that window and additional options will appear that let you delete the existing partitions.
The installer and other disk tools in Windows 7 understand SSDs and will issue the appropriate commands. But make sure that your motherboard SATA controller is in "AHCI" mode and not "IDE emulation" mode before you start the install, since the new SSD commands such as "TRIM" are only supported in AHCI mode.
Suggestion: Disconnect all of your other drives before installing Windows on the SSD. Windows creates a small "System Reserved" partition that contains recovery tools - this is the actual boot partition. If Windows can find space on some other drive it will place the reserved partition there instead of on the SSD. Most people prefer that the drive that holds the OS is the boot drive, and disconnecting the other drives will ensure this is the case.
if you check some other threads you will see that in some cases windows will not properly reformat or partition an SSD drive. One suggestion involves a command line routine to successfully re-partition and format the drive for a successful installation or re-installation.