| Microsoft DirectX 8.1 (Visual Basic) | 
Retrieves the gamma correction ramp for the swap chain.
object.GetGammaRamp( _ 
    Ramp As D3DGAMMARAMP)
If the method fails, an error is raised and Err.Number can be set to D3DERR_INVALIDCALL.
For information on trapping errors, see the Microsoft® Visual Basic® Error Handling topic.