The ExtFloodFill function fills an area of the display surface with the current brush.
BOOL ExtFloodFill(
| HDC hdc, | // handle to device context |
| int nXStart, | // x-coordinate where filling begins |
| int nYStart, | // y-coordinate where filling begins |
| COLORREF crColor, | // fill color |
| UINT fuFillType | // fill type |
| ); |
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