https://learn.microsoft.com/en-us/windows/win32/api/ddrawint/ns-ddrawint-dd_surfacecallbacks?redirectedfrom=MSDN
DD_SURFACECALLBACKS (ddrawint.h) - Win32 apps | Microsoft Learn
The DD_SURFACECALLBACKS structure contains entry pointers to the Microsoft DirectDraw surface callback functions that a device driver supports.
ddhappsmicrosoftlearn