CDC::InvertRect

CDC::InvertRect

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Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

Visual Studio 2010 - Visual C++

CDC::InvertRect

Inverts the contents of the given rectangle.

void InvertRect(
   LPCRECT lpRect 
);

Parameters

lpRect: Points to a RECT that contains the logical coordinates of the rectangle to be inverted. You can also pass a CRect object for this parameter.

Remarks

Inversion is a logical NOT operation and flips the bits of each pixel. On monochrome displays, the function makes white pixels black and black pixels white. On color displays, the inversion depends on how colors are generated for the display. Calling InvertRect twice with the same rectangle restores the display to its previous colors.

If the rectangle is empty, nothing is drawn.

Example

Visual C++

void CDCView::DoInvertRect(CDC* pDC)
{
   // invert rect from 20,20 to 50,50
   CRect rect(20, 20, 50, 50);
   pDC->InvertRect(rect);

   // inverting again restores to normal
   ::Sleep(1000);
   pDC->InvertRect(rect);   
}

Requirements

Header: afxwin.h

Reference

Other Resources

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