SetAngle Method (NLinearGradientFill)
Sets the linear gradient angle to the specified value. Center the gradient to pass through the center of the gradient rect. Adjusts the coverage points so that the gradient fill the entire gradient rect completely.
Target Platforms: Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2