Call this member function to fill the given rectangle with the specified solid color.
Specifies the bounding rectangle (in logical units). You can pass either a pointer to a RECT data structure or a CRect object for this parameter.
clr Specifies the color to be used to fill the rectangle.
Specifies the logical x-coordinate of the upper-left corner of the rectangle.
Specifies the logical y-coordinate of the upper-left corner of the destination rectangle.
Specifies the width of the rectangle.
Specifies the height of the rectangle.
FillSolidRect is very similar to CDC::FillRect; however, FillSolidRect uses only solid colors (indicated by the COLORREF parameter), while FillRect takes a brush and therefore can be used to fill a rectangle with a solid color, a dithered color, hatched brushes, or a pattern. FillSolidRect usually is faster than FillRect.
When you call FillSolidRect, the background color, which was previously set using SetBkColor, is set to the color indicated by clr.