## Display Device Driver Reference for OS/2

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### DBCS Enabling

The sample code (IBMVGA32.DLL) already includes DBCS enabling. If the VGA/ SVGA driver is chosen as the base code then no adaptation for DBCS enabling is required. This is because this code does not have any hardware dependencies. To maintain compatibility among display drivers DO NOT change the enabled code for DBCS. If the VGA/SVGA driver is not used as the base code, then modifications will be necessary to provide DBCS enabling.

The PM display driver handles DBCS characters by calling the font manager ( PMNLSFM.DLL). Using the font manager and font driver (PMNLSFD.FDR) for DBCS fonts results in the handling of SBCS proportional fonts. The interface for the font manager is described in Device Driver Font Manager Interface.