[DllImport("gdi32.dll", EntryPoint = "GdiGradientFill", ExactSpelling = true)]
public static extern bool GradientFill(
IntPtr hdc, // handle to DC
IntPtr pVertex, // array of vertices
uint dwNumVertex, // number of vertices
IntPtr pMesh, // array of gradients
uint dwNumMesh, // size of gradient array
uint dwMode // gradient fill mode);
Declare Function GradientFill Lib "gdi32.dll" (TODO) As TODO