BOOL CreateEllipticRgn( int x1, int y1, int x2, int y2 );
x1
Specifies the x-coordinate of the upper-left corner of the bounding rectangle of the ellipse.
y1
Specifies the y-coordinate of the upper-left corner of the bounding rectangle of the ellipse.
x2
Specifies the x-coordinate of the lower-right corner of the bounding rectangle of the ellipse.
y2
Specifies the y-coordinate of the lower-right corner of the bounding rectangle of the ellipse.
Creates an elliptical region. The region is defined by the bounding rectangle specified by x1, y1, x2, and y2. The region is stored in the CRgn object.
TRUE if the operation succeeded; otherwise FALSE.
CRgn::CreateEllipticRgnIndirect, ::CreateEllipticRgn