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PolyBezier function

The PolyBezier function draws one or more Bézier curves.

Syntax


BOOL PolyBezier(
  _In_  HDC hdc,
  _In_  const POINT *lppt,
  _In_  DWORD cPoints
);

Parameters

hdc [in]

A handle to a device context.

lppt [in]

A pointer to an array of POINT structures that contain the endpoints and control points of the curve(s), in logical units.

cPoints [in]

The number of points in the lppt array. This value must be one more than three times the number of curves to be drawn, because each Bézier curve requires two control points and an endpoint, and the initial curve requires an additional starting point.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

Remarks

The PolyBezier function draws cubic Bézier curves by using the endpoints and control points specified by the lppt parameter. The first curve is drawn from the first point to the fourth point by using the second and third points as control points. Each subsequent curve in the sequence needs exactly three more points: the ending point of the previous curve is used as the starting point, the next two points in the sequence are control points, and the third is the ending point.

The current position is neither used nor updated by the PolyBezier function. The figure is not filled.

This function draws lines by using the current pen.

Examples

For an example, see Redrawing in the Update Region.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Wingdi.h (include Windows.h)

Library

Gdi32.lib

DLL

Gdi32.dll

See also

Lines and Curves Overview
Line and Curve Functions
MoveToEx
POINT
PolyBezierTo

 

 

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