IsRectEmpty

2.x

The IsRectEmpty function determines whether the specified rectangle is empty. A rectangle is empty if its width or height is zero, or if both are zero.

Parameters

lprc

Points to a RECT structure that contains the coordinates of the rectangle. The RECT structure has the following form:

typedef struct tagRECT {    /* rc */
   int left;
   int top;
   int right;
   int bottom;
} RECT;

For a full description of this structure, see the Microsoft Windows Programmer's Reference, Volume 3.

Return Value

The return value is nonzero if the rectangle is empty. Otherwise, it is zero.

Example

The following example uses the IsRectEmpty function to determine whether a rectangle is empty and then displays a message box giving the status of the rectangle:

RECT rc;

if (IsRectEmpty((LPRECT) &rc))
    MessageBox(hwnd, "Rectangle is empty.",
        "Rectangle Status", MB_OK);
else
    MessageBox(hwnd, "Rectangle is not empty.",
        "Rectangle Status", MB_OK);