The Drivers Control Panel application installs, configures, and removes drivers. When started, the Drivers Control Panel application displays the following dia-log box.
The Installed Drivers list box displays the description strings of the installed drivers. The installed drivers are determined by examining the [drivers] and [mci] sections of the SYSTEM.INI file. The description strings are cached in the [drivers.description] section of the CONTROL.INI file to reduce delays in find-ing and loading them. If a description string does not match an installed driver, the application searches the MMSETUP.INF file and then the header of the driver file to obtain the description string. A scroll bar appears in the list box if there are more drivers than can be displayed.
The following buttons are found in the Control Panel dialog box:
| Button | Result when chosen |
| OK | Exits the dialog box and makes any changes permanent. |
| Cancel | Exits the dialog box. The application ignores any requests to install or remove drivers made during the session. Any configuration changes made during the session are retained because they are done by the driver. |
| Remove | Removes the information about the selected driver from the SYSTEM.INI file. When removing drivers, the Control Panel application sends the DRV_REMOVE message to the driver if there is only one entry in the SYSTEM.INI file for it. |
| Setup | Applies only to configurable drivers. When the user selects a driver in the list box, the application opens the driver and sends it the DRV_QUERYCONFIGURE message. If a driver responds that it can be configured—that is, it supports a configuration dialog box to set such parameters as the COM port, the interrupt number, or input and output (I/O) port address—then the application enables the Setup button. If the user chooses the Setup button, the application sends a DRV_CONFIGURE message to the driver. |
| Add Drivers | Installs a new driver. |
| Default | Redisplays the list of files from the MMSETUP.INF file. Note that the Default button is active when the OEM drivers are displayed. |