MonitorFromRect

[This is preliminary documentation and subject to change.]

The MonitorFromRect function obtains a handle to the display monitor that has the largest area of intersection with a specified rectangle.

HMONITOR MonitorFromRect(
  LPCRECT lprc,    // pointer to a RECT structure 
  DWORD dwFlags    // flags if no monitor intersects the rectangle 
);
 

Parameters

lprc

Pointer to a RECT structure that specifies the rectangle of interest.

dwFlags

A set of flags that determine the function's return value if the rectangle does not intersect any display monitor.

This parameter can be one of the following values.

Value	Meaning
MONITOR_DEFAULTTONEAREST	Return a handle to the display monitor that is nearest to the rectangle.
MONITOR_DEFAULTTONULL	Return NULL.
MONITOR_DEFAULTTOPRIMARY	Return a handle to the primary display monitor.

Return Values

If the rectangle intersects one or more display monitor rectangles, the return value is an HMONITOR handle to the display monitor that has the largest area of intersection with the rectangle.

If the rectangle does not intersect a display monitor, the return value depends on the value of dwFlags.

QuickInfo

  Windows NT: Requires version 5.0 or later.
  Windows: Requires Windows 98.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.
  Import Library: Use user32.lib.

See Also

Multiple Display Monitors Overview, Multiple Display Monitors Functions, MonitorFromPoint, MonitorFromWindow