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CRgn::CreateRoundRectRgn

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BOOLCreateRoundRectRgn(intx1**,inty1,intx2,inty2,intx3,inty3);**

Return Value

Nonzero if the operation succeeded; otherwise 0.

Parameters

x1

Specifies the logical x-coordinate of the upper-left corner of the region.

y1

Specifies the logical y-coordinate of the upper-left corner of the region.

x2

Specifies the logical x-coordinate of the lower-right corner of the region.

y2

Specifies the logical y-coordinate of the lower-right corner of the region.

x3

Specifies the width of the ellipse used to create the rounded corners.

y3

Specifies the height of the ellipse used to create the rounded corners.

Remarks

Creates a rectangular region with rounded corners that is stored in the CRgn object.

The size of a region is limited to 32,767 by 32,767 logical units or 64K of memory, whichever is smaller.

When an application has finished using a region created with the CreateRoundRectRgn function, it should select the region out of the device context and use the CGDIObject::DeleteObject member function to remove it.

Example

CRgn   rgnA, rgnB, rgnC;

VERIFY(rgnA.CreateRoundRectRgn( 50, 50, 150, 150, 30, 30 ));
VERIFY(rgnB.CreateRoundRectRgn( 200, 75, 250, 125, 50, 50 ));
VERIFY(rgnC.CreateRectRgn( 0, 0, 50, 50 ));

int nCombineResult = rgnC.CombineRgn( &rgnA, &rgnB, RGN_OR );
ASSERT( nCombineResult != ERROR || nCombineResult != NULLREGION );

CBrush brA, brB, brC;
VERIFY(brA.CreateSolidBrush( RGB(255, 0, 0) )); 
VERIFY(pDC->FillRgn( &rgnA, &brA));      // rgnA Red Filled

VERIFY(brB.CreateSolidBrush( RGB(0, 255, 0) )); 
VERIFY(pDC->FillRgn( &rgnB, &brB));      // rgnB Green Filled
VERIFY(brC.CreateSolidBrush( RGB(0, 0, 255) ));  // rgnC Blue
VERIFY(pDC->FrameRgn( &rgnC, &brC, 2, 2 ));

CRgn Overview |  Class Members |  Hierarchy Chart

See Also   CRgn::CreateRectRgn, CRgn::CreateRectRgnIndirect,