GetRgnBox function (wingdi.h)

The GetRgnBox function retrieves the bounding rectangle of the specified region.

Syntax

int GetRgnBox(
  [in]  HRGN   hrgn,
  [out] LPRECT lprc
);

[in] hrgn

A handle to the region.

[out] lprc

A pointer to a RECT structure that receives the bounding rectangle in logical units.

The return value specifies the region's complexity. It can be one of the following values:

Value	Meaning
NULLREGION	Region is empty.
SIMPLEREGION	Region is a single rectangle.
COMPLEXREGION	Region is more than a single rectangle.

If the hrgn parameter does not identify a valid region, the return value is zero.

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	wingdi.h (include Windows.h)
Library	Gdi32.lib
DLL	Gdi32.dll