[GD-Windows] BitBlt() syncing to VBL

[Brian H. <bri...@py...>]

My blitting code on a PowerMac G4/867 is running over 50% faster than on a 
PC of higher clock speed (and with a faster video card to boot).  It feels 
like it's syncing to VBL on the PC -- 75fps on a 76Hz LCD -- but I was 
under the impression that GDI's BitBlt() doesn't sync to VBL.  Is this not 
the case?  I was getting the distinct feeling that it was syncing to VBL 
using DDraw's Blt() function, which is one reason I switched to GDI (not to 
mention that blitting using memcpy() has proven to be light years faster 
than using DDraw's blitters).

Brian