pascal OSErr GDGetScale(GDHandle gdh,Fixed *scale,short *flags)
gdh A handle to a screen graphics device.
scale Pointer to a fixed point field to hold the scale result.
flags Pointer to a short integer. It returns the status parameter flags for the video driver. For now, 0 is always returned in this field.
Errors:
cDevErr Not a screen device.
controlErr Video driver can not respond to this call.
See also: QuickTime Tech Note QT4.
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