如何画一个四角修圆的客户区！最好有代码！

[babam]

问了好多地方都没有人告诉我该怎么做！

[lingg2002]

关注

[bhsbhs]

说明白一点，我给你看看

[coraykuang]

CDC::RoundRect
BOOL RoundRect( int x1, int y1, int x2, int y2, int x3, int y3 );
BOOL RoundRect( LPCRECT lpRect, POINT point );

[shuiyan]

我是在Dialog内的，你可以到MSDN中找对应的函数看：
1.定义一个CRng对象 m_rgn;
2.在OnInitDialog()中（即初始化）添加如下代码
//这个设置成“四角圆形”
m_rgn.CreateRoundRectRgn(0, 0, rect.right, rect.bottom, 40, 40);
//这个设置成“椭圆”
//m_rgn.CreateEllipticRgn(0,0,rect.Width(),rect.Height());
//以上两个选一个就行，另外还有可以设置多边形的函数

//调用Win32API函数显示
::SetWindowRgn(GetSafeHwnd(),(HRGN)m_rgn,TRUE);

[tomPeakz]

下面是一个绘制XP圆角风格的按钮代码：
#include "stdafx.h"
#include "WinXPButtonST.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

CWinXPButtonST::CWinXPButtonST()
{
// No rounded borders
m_bIsRounded = FALSE;
}

CWinXPButtonST::~CWinXPButtonST()
{
}

// This function is called every time the button border needs to be painted.
// If the button is in standard (not flat) mode this function will NOT be called.
// This is a virtual function that can be rewritten in CButtonST-derived classes
// to produce a whole range of buttons not available by default.
//
// Parameters:
// [IN] pDC
// Pointer to a CDC object that indicates the device context.
// [IN] pRect
// Pointer to a CRect object that indicates the bounds of the
// area to be painted.
//
// Return value:
// BTNST_OK
// Function executed successfully.
//
DWORD CWinXPButtonST::OnDrawBorder(CDC* pDC, LPCRECT pRect)
{
return BTNST_OK;
} // End of OnDrawBorder

// This function is called every time the button background needs to be painted.
// If the button is in transparent mode this function will NOT be called.
// This is a virtual function that can be rewritten in CButtonST-derived classes
// to produce a whole range of buttons not available by default.
//
// Parameters:
// [IN] pDC
// Pointer to a CDC object that indicates the device context.
// [IN] pRect
// Pointer to a CRect object that indicates the bounds of the
// area to be painted.
//
// Return value:
// BTNST_OK
// Function executed successfully.
//
DWORD CWinXPButtonST::OnDrawBackground(CDC* pDC, LPCRECT pRect)
{
if (!m_bMouseOnButton && !m_bIsPressed)
return BASE_BUTTONST::OnDrawBackground(pDC, pRect);

// Create and select a solid brush for button background
CBrush brushBK(m_crColors[BTNST_COLOR_BK_IN]);
CBrush* pOldBrush = pDC->SelectObject(&brushBK);

// Create and select a thick black pen for button border
CPen penBorder;
penBorder.CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
CPen* pOldPen = pDC->SelectObject(&penBorder);

if (m_bIsRounded)
pDC->RoundRect(pRect, CPoint(8, 8));
else
pDC->Rectangle(pRect);

// Put back the old objects
pDC->SelectObject(pOldBrush);
pDC->SelectObject(pOldPen);

return BTNST_OK;
} // End of OnDrawBackground

// This function enables or disables the rounded border for the button.
//
// Parameters:
// [IN] bRounded
// If TRUE the button will have a round border.
// [IN] bRepaint
// If TRUE the button will be repainted.
//
// Return value:
// BTNST_OK
// Function executed successfully.
//
DWORD CWinXPButtonST::SetRounded(BOOL bRounded, BOOL bRepaint)
{
m_bIsRounded = bRounded;
if (bRepaint) Invalidate();

return BTNST_OK;
} // End of SetRounded

#undef BASE_BUTTONST

[40Star]

setwindowrgn

[40Star]

CreatePolygonRgn