Function GdipSetImageAttributesThreshold
pub unsafe extern "system" fn GdipSetImageAttributesThreshold(
imageattr: *mut GpImageAttributes,
type: ColorAdjustType,
enableflag: BOOL,
threshold: f32,
) -> Status
pub unsafe extern "system" fn GdipSetImageAttributesThreshold(
imageattr: *mut GpImageAttributes,
type: ColorAdjustType,
enableflag: BOOL,
threshold: f32,
) -> Status