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The following table shows global variables that should be declared in your driver. Some of these variables are set up by DDGPE, but others are driver-specific and must be set up in your buildDDHALInfo function.
| Variable | Description |
|---|---|
| g_pDDrawPrimarySurface | Contains a pointer to a DDGPESurf class representing the primary DirectDraw surface. |
| g_pGPE | Contains a pointer to the DDGPE-based class created and implemented by the driver. |
| g_pVideoMemory | Contains a virtual address of video memory. |
| g_nVideoMemorySize | Contains the total amount of video memory available on the hardware. |
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