ExtFloodFill info  Overview  Group

The ExtFloodFill function fills an area of the display surface with the current brush.

BOOL ExtFloodFill(

Parameters

hdc

Identifies a device context.

nXStart

Specifies the logical x-coordinate of the point where filling is to begin.

nYStart

Specifies the logical y-coordinate of the point where filling is to begin.

crColor

Specifies the color of the boundary or of the area to be filled. The interpretation of crColor depends on the value of the fuFillType parameter.

fuFillType

Specifies the type of fill operation to be performed. It must be one of the following values:

Value	Meaning
FLOODFILLBORDER	The fill area is bounded by the color specified by the crColor parameter. This style is identical to the filling performed by the FloodFill function.
FLOODFILLSURFACE	The fill area is defined by the color that is specified by crColor. Filling continues outward in all directions as long as the color is encountered. This style is useful for filling areas with multicolored boundaries.

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

Following are some of the reasons this function might fail:

• The filling could not be completed.

• The specified point has the boundary color specified by the crColor parameter (if FLOODFILLBORDER was requested).

• The specified point does not have the color specified by crColor (if FLOODFILLSURFACE was requested).

• The point is outside the clipping region ¾ that is, it is not visible on the device.

If the fuFillType parameter is FLOODFILLBORDER, Windows assumes that the area to be filled is completely bounded by the color specified by the crColor parameter. The function begins filling at the point specified by the nXStart and nYStart parameters and continues in all directions until it reaches the boundary.

If fuFillType is FLOODFILLSURFACE, Windows assumes that the area to be filled is a single color. The function begins to fill the area at the point specified by nXStart and nYStart and continues in all directions, filling all adjacent regions containing the color specified by crColor.

Only memory device contexts and devices that support raster-display operations support the ExtFloodFill function. To determine whether a device supports this technology, use the GetDeviceCaps function.

See Also

FloodFill, GetDeviceCaps

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