GetBoundsRect function (wingdi.h)

Artículo
10/13/2021
Tiempo de lectura: 2 minutos

The GetBoundsRect function obtains the current accumulated bounding rectangle for a specified device context.

The system maintains an accumulated bounding rectangle for each application. An application can retrieve and set this rectangle.

Syntax

UINT GetBoundsRect(
  [in]  HDC    hdc,
  [out] LPRECT lprect,
  [in]  UINT   flags
);

Parameters

[in] hdc

A handle to the device context whose bounding rectangle the function will return.

[out] lprect

A pointer to the RECT structure that will receive the current bounding rectangle. The application's rectangle is returned in logical coordinates, and the bounding rectangle is returned in screen coordinates.

[in] flags

Specifies how the GetBoundsRect function will behave. This parameter can be the following value.

Value	Meaning
DCB_RESET	Clears the bounding rectangle after returning it. If this flag is not set, the bounding rectangle will not be cleared.

Return value

The return value specifies the state of the accumulated bounding rectangle; it can be one of the following values.

Value	Meaning
0	An error occurred. The specified device context handle is invalid.
DCB_DISABLE	Boundary accumulation is off.
DCB_ENABLE	Boundary accumulation is on.
DCB_RESET	The bounding rectangle is empty.
DCB_SET	The bounding rectangle is not empty.

Remarks

The DCB_SET value is a combination of the bit values DCB_ACCUMULATE and DCB_RESET. Applications that check the DCB_RESET bit to determine whether the bounding rectangle is empty must also check the DCB_ACCUMULATE bit. The bounding rectangle is empty only if the DCB_RESET bit is 1 and the DCB_ACCUMULATE bit is 0.

Requirements


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