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AngleArc info  Overview  Group

The AngleArc function draws a line segment and an arc. The line segment is drawn from the current position to the beginning of the arc. The arc is drawn along the perimeter of a circle with the given radius and center. The length of the arc is defined by the given start and sweep angles.

BOOL AngleArc(

    HDC hdc,

// handle to device context

    int X,

// x-coordinate of circle’s center

    int Y,

// y-coordinate of circle’s center

    DWORD dwRadius,

// circle’s radius

    FLOAT eStartAngle,

// arc’s start angle

    FLOAT eSweepAngle 

// arc’s sweep angle

   );

Parameters

hdc
Identifies a device context.
X
Specifies the logical x-coordinate of the center of the circle.
Y
Specifies the logical y-coordinate of the center of the circle.
dwRadius
Specifies the radius, in logical units, of the circle. This value must be positive.
eStartAngle
Specifies the start angle, in degrees, relative to the x-axis.
eSweepAngle
Specifies the sweep angle, in degrees, relative to the starting angle.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The AngleArc function moves the current position to the ending point of the arc.

The arc drawn by this function may appear to be elliptical, depending on the current transformation and mapping mode. Before drawing the arc, AngleArc draws the line segment from the current position to the beginning of the arc.

The arc is drawn by constructing an imaginary circle around the specified center point with the specified radius. The starting point of the arc is determined by measuring counterclockwise from the x-axis of the circle by the number of degrees in the start angle. The ending point is similarly located by measuring counterclockwise from the starting point by the number of degrees in the sweep angle.

If the sweep angle is greater than 360 degrees, the arc is swept multiple times.

This function draws lines by using the current pen. The figure is not filled.

See Also

Arc, ArcTo, MoveToEx

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