private Color ShadowColor( Color AStart, Color AEnd, double ARate)
{
double R = AEnd . R - AStart . R;
double G = AEnd . G - AStart . G;
double B = AEnd . B - AStart . B;
return Color . FromArgb(
( int )(AStart . R + R * ARate),
( int )(AStart . G + G * ARate),
( int )(AStart . B + B * ARate));
}
private void button1_Click( object sender , EventArgs e)
{
Graphics vGraphics = Graphics . FromHwnd(Handle);
int j = 0 ;
for ( int i = 500 ; i <= 3500 ; i += 10 )
{
vGraphics . DrawLine( new Pen (ShadowColor(
Color . Blue, Color . Red, ( double )i / 3500 )),
new Point ( 0 , j), new Point ( 20 , j));
j ++ ;
}
}