.GRP File Extension

File created by SmarterMail, an email server application used to host Web email access; stores one day's worth of email messages for a mailbox folder; used for storing a database of email messages for a particular user.

GRP files are created with filenames that reflect the date of the email messages. For example, the file 2011-01-01.grp contains all email message data for January 1, 2011 for a particular mailbox folder. GRP files are saved with a corresponding ".cfg" file, which has the list of all email messages and the GRP file where each message is located.

Defines a group of programs listed in the Windows Start Menu; i.e. "Main," "Games," "Accessories," or other folder.

If a GRP file becomes corrupt, you can restore it to Windows default settings by using the Program Manager. Select File→Run, then type "setup /p" and press Enter. This will rebuild the GRP file using Windows default settings.

Collection of frame images used for units, weapons, spells, wireframes, and menu graphics within Starcraft; each object may contain anywhere from a few to several hundred frames.

GRP files may be extracted from the .MPQ file. They are referenced by StarCraft, but can be edited with a third-party editor.