The [Drivers\Display\Active] Key

The [HKEY_LOCAL_MACHINE\Drivers\Display\Active] key contains subkeys for display drivers that are currently in use on a Windows CE platform. Each subkey is named after the display driver it serves, and contains values described in the following table.

Value Name Value Type Description
BufferMode DWORD Controls the correlation between the display adapter's frame buffer and the frame buffer for any built-in displays on the Windows CE platform. BufferMode must be set to one of the following values: 0 (no common frame buffer), 1 (the top half of the display adapter's buffer is mirrored on the built-in display), 2 (a scaled down version of the display adapter's frame buffer is mirrored on the built-in display), or 3 (the built-in display is turned off while this driver is active).
Dll REG_SZ The name of the .DLL file that contains the display driver.
TapMode DWORD Controls how tap or click events are managed. TapMode must be set to one of the following values: 0 (tapping not supported), 1 (tap coordinates are unmodified), 2 (tap coordinates are scaled to match the display driver's coordinate space), or 3 (tap coordinates are undefined, but tap events are still delivered to applicaitons, optionally with coordinates 0,0).

The following example shows the contents under the Display key for a sample display driver:

HKEY_LOCAL_MACHINE
    [Drivers]
        [Display]
            [Active]
                [GenericVGA]
                    SZ: Dll = GENVGA.DLL
                    DWORD: BufferMode = 0
                    DWORD: TapMode = 0