RectVisible function (wingdi.h)

The RectVisible function determines whether any part of the specified rectangle lies within the clipping region of a device context.

Syntax

BOOL RectVisible(
  [in] HDC        hdc,
  [in] const RECT *lprect
);

[in] hdc

A handle to the device context.

[in] lprect

A pointer to a RECT structure that contains the logical coordinates of the specified rectangle.

If the current transform does not have a rotation and the rectangle lies within the clipping region, the return value is TRUE (1).

If the current transform does not have a rotation and the rectangle does not lie within the clipping region, the return value is FALSE (0).

If the current transform has a rotation and the rectangle lies within the clipping region, the return value is 2.

If the current transform has a rotation and the rectangle does not lie within the clipping region, the return value is 1.

All other return values are considered error codes. If the any parameter is not valid, the return value is undefined.

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