The HKEY_LOCAL_MACHINE\Drivers\Display\Active\ key contains subkeys for display drivers currently in use on a Windows CE–based platform. Each subkey shares the name of the display driver that it serves. The following table describes the values contained in each subkey.
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–based 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 | 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 applications, 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