GDI

Irregular window's shape, gradient fill

• Demonstration
• Functionality:
  • Create one window
    • window has the shape of the triangle with additional circles at all vertex
    • verticies have a diameter of 15 pixels
    • each vertex has a different colour, the colours are: red, green and blue
    • interior of the triangle is filled with gradient of all the colours
    • created window is a top-most one
    • each vertex can be dragged all over the screen
    • only one window (with irregular shape) could be created
    • initial verticies position:
      • red: (100, 100)
      • green: (400, 100)
      • blue: (300, 300)
• Hints:
  • CreatePolygonRgn(), CreateEllipticRgn(), CombineRgn()
  • SetWindowRgn()
  • RedrawWindow()
  • [Msimg32.lib] GradientFill(), TRIVERTEX, GRADIENT_TRIANGLE

• Approximate points:
  • irregular shape, window style: 3.5
  • gradient: 2.5
  • circles colour: 1.0
  • verticies moving: 3.0