c++ 实现不同状态的图片按钮

#pragma once


// CMyButton

class CMyButton : public CButton
{
	DECLARE_DYNAMIC(CMyButton)
protected:
	//按钮的外边框
	CPen m_BoundryPen;
	enum SYTLE{ROUNDRECT,ELLIPSE,UPTRIANGLE,DOWNTRIANGLE}m_Style; // 按钮的外观样式
	//鼠标指针置于按钮之上时按钮的内边框
	CPen m_InsideBoundryPenLeft;
	CPen m_InsideBoundryPenRight;
	CPen m_InsideBoundryPenTop;
	CPen m_InsideBoundryPenBottom;

	//按钮获得焦点时按钮的内边框
	CPen m_InsideBoundryPenLeftSel;
	CPen m_InsideBoundryPenRightSel;
	CPen m_InsideBoundryPenTopSel;
	CPen m_InsideBoundryPenBottomSel;

	//按钮的底色，包括有效和无效两种状态
	CBrush m_FillActive;
	CBrush m_FillInactive;

	//按钮的状态
	BOOL m_bOver;	//鼠标位于按钮之上时该值为true，反之为flase
	BOOL m_bTracking;	//在鼠标按下没有释放时该值为true
	BOOL m_bSelected;	//按钮被按下是该值为true
	BOOL m_bFocus;	//按钮为当前焦点所在时该值为true


	CBitmap m_NormalBitmap;
	CBitmap m_PressedBitmap;
	CBitmap m_FocusBitmap;
	CBitmap m_OverBitmap;
	CBitmap m_MaskBitmap;
	CBitmap m_BackBitmap;

	// 是否使用蒙板
	bool IsMask;
	bool IsMaskRgn;
	bool IsBackBmp;
	CRect BackRect;

public:
	void SetRgnMask(int nMaskBmpId, bool nAction);//设置位图转成有效区域
	void SetBackBmp(int nBgdBmpId,CRect rect);
	void SetMaskBitmapId(int mask, bool action);//设置蒙板图片，显示不规则图片
	static HRGN BitmapToRegion(HBITMAP hBmp, COLORREF cTransparentColor, COLORREF cTolerance = RGB(0,0,0));//位图转换成区域
	void SetRgnStyle(SYTLE nStyle); // 设置按钮有效区域的样式
	void SetBitmapId(int nOver,int nNormal,int nPressed,int nFocus); // 设定按钮各种状态的图片ID
	virtual void DoGradientFill(CDC *pDC, CRect* rect);//绘制按钮的底色
	virtual void DrawInsideBorder(CDC *pDC, CRect* rect);//绘制按钮的内边框

	CMyButton();
	virtual ~CMyButton();

protected:

	DECLARE_MESSAGE_MAP()
	
public:

	virtual void PreSubclassWindow();
	virtual void DrawItem(LPDRAWITEMSTRUCT  lpDrawItemStruct);

	//afx_msg LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
	//afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);

public:
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
	afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);
};

// ControlButton.cpp : implementation file
//

#include "stdafx.h"
#include "MyButton.h"


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

/
// CMyButton
IMPLEMENT_DYNAMIC(CMyButton, CButton)
CMyButton::CMyButton()
{
	m_BoundryPen.CreatePen(PS_INSIDEFRAME | PS_SOLID, 1, RGB(0, 0, 0));
	m_InsideBoundryPenLeft.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(250, 196, 88)); 
	m_InsideBoundryPenRight.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(251, 202, 106));
	m_InsideBoundryPenTop.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(252, 210, 121));
	m_InsideBoundryPenBottom.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(229, 151, 0));

	m_FillActive.CreateSolidBrush(RGB(223, 222, 236));
	m_FillInactive.CreateSolidBrush(RGB(222, 223, 236));

	m_InsideBoundryPenLeftSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(153, 198, 252)); 
	m_InsideBoundryPenTopSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(162, 201, 255));
	m_InsideBoundryPenRightSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(162, 189, 252));
	m_InsideBoundryPenBottomSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(162, 201, 255));

	m_bOver = m_bSelected = m_bTracking = m_bFocus = FALSE;
	IsMask = FALSE;
	IsMaskRgn = FALSE;
	IsBackBmp = FALSE;
	m_Style = ROUNDRECT;

}

CMyButton::~CMyButton()
{
	m_BoundryPen.DeleteObject();
	m_InsideBoundryPenLeft.DeleteObject();
	m_InsideBoundryPenRight.DeleteObject();
	m_InsideBoundryPenTop.DeleteObject();
	m_InsideBoundryPenBottom.DeleteObject();

	m_FillActive.DeleteObject();
	m_FillInactive.DeleteObject();

	m_InsideBoundryPenLeftSel.DeleteObject();
	m_InsideBoundryPenTopSel.DeleteObject();
	m_InsideBoundryPenRightSel.DeleteObject();
	m_InsideBoundryPenBottomSel.DeleteObject();
}


BEGIN_MESSAGE_MAP(CMyButton, CButton)
	ON_WM_MOUSEMOVE()
	ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
	ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
END_MESSAGE_MAP()


/
// CMyButton message handlers



void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	//从lpDrawItemStruct获取控件的相关信息
	CRect rect =  lpDrawItemStruct->rcItem;
	CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
	int nSaveDC=pDC->SaveDC();
	UINT state = lpDrawItemStruct->itemState;

	//获取按钮的状态
	if (state & ODS_FOCUS)
	{
		m_bFocus = TRUE;
		m_bSelected = TRUE;
	}
	else
	{
		m_bFocus = FALSE;
		m_bSelected = FALSE;
	}


	if (state & ODS_SELECTED || state & ODS_DEFAULT)
	{
		m_bFocus = TRUE;
	}

	//根据按钮的状态贴图
	if (m_bOver)
	{
		CDC MemDC;
		MemDC.CreateCompatibleDC(pDC);
		CBitmap *pOldBmp;
		pOldBmp = MemDC.SelectObject(&m_OverBitmap);		
		BITMAP bmp; 
		m_OverBitmap.GetObject(sizeof(bmp),&bmp);
		//pDC->StretchBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY);
		if (IsMask==TRUE) //值为真则去除图片背景
		{
			CDC MaskDC;

			MaskDC.CreateCompatibleDC(pDC);

			if (IsBackBmp==TRUE)//使用和主窗口相同的背景图片
			{
				CBitmap *pOldBmp;
				CDC BackDC;
				BackDC.CreateCompatibleDC(pDC);
				pOldBmp = MaskDC.SelectObject(&m_MaskBitmap);
				BackDC.SelectObject(&m_BackBitmap);
				pDC->BitBlt(0,0,rect.Width(),rect.Height(),&BackDC,BackRect.left,BackRect.top,SRCCOPY);
			}

			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MaskDC,0,0,MERGEPAINT);
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCAND);
			ReleaseDC(&MaskDC);
		}
		else
		{
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);
		}

		pDC->RestoreDC(nSaveDC);
	}
	else
	{
		CDC MemDC;
		MemDC.CreateCompatibleDC(pDC);
		CBitmap *pOldBmp;
		pOldBmp = MemDC.SelectObject(&m_NormalBitmap);		
		BITMAP bmp; 
		m_NormalBitmap.GetObject(sizeof(bmp),&bmp);
		//pDC->StretchBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY);

		if (IsMask==TRUE)
		{
			CDC MaskDC;
			MaskDC.CreateCompatibleDC(pDC);
			if (IsBackBmp==TRUE)
			{
				CBitmap *pOldBmp;
				CDC BackDC;
				BackDC.CreateCompatibleDC(pDC);
				pOldBmp = MaskDC.SelectObject(&m_MaskBitmap);
				BackDC.SelectObject(&m_BackBitmap);
				pDC->BitBlt(0,0,rect.Width(),rect.Height(),&BackDC,BackRect.left,BackRect.top,SRCCOPY);
			}

			CBitmap *pOldBmp;
			pOldBmp = MaskDC.SelectObject(&m_MaskBitmap);
			//BITMAP bmp;
			//m_MaskBitmap.GetObject(sizeof(bmp),&bmp);
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MaskDC,0,0,MERGEPAINT);
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCAND);

		}
		else
		{
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);

		}
		pDC->RestoreDC(nSaveDC);
	}

	//按钮被按下(选中)
	if (state & ODS_SELECTED)
	{

		CDC MemDC;
		MemDC.CreateCompatibleDC(pDC);
		CBitmap *pOldBmp;
		pOldBmp = MemDC.SelectObject(&m_PressedBitmap);		
		BITMAP bmp; 
		m_PressedBitmap.GetObject(sizeof(bmp),&bmp);
		//pDC->StretchBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY);
		if (IsMask==TRUE)
		{
			CDC MaskDC;
			MaskDC.CreateCompatibleDC(pDC);
			if (IsBackBmp==TRUE)
			{
				CBitmap *pOldBmp;
				CDC BackDC;
				BackDC.CreateCompatibleDC(pDC);
				pOldBmp = MaskDC.SelectObject(&m_MaskBitmap);
				BackDC.SelectObject(&m_BackBitmap);
				pDC->BitBlt(0,0,rect.Width(),rect.Height(),&BackDC,BackRect.left,BackRect.top,SRCCOPY);
			}

			CBitmap *pOldBmp;
			pOldBmp = MaskDC.SelectObject(&m_MaskBitmap);
			//BITMAP bmp;
			//m_MaskBitmap.GetObject(sizeof(bmp),&bmp);
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MaskDC,0,0,MERGEPAINT);
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCAND);

		}
		else
		{
			pDC->BitBlt(0,0,rect.Width(),rect.Height(),&MemDC,0,0,SRCCOPY);

		}
		pDC->RestoreDC(nSaveDC);
	}


}



//绘制按钮的底色
void CMyButton::DoGradientFill(CDC *pDC, CRect* rect)
{
	CBrush brBk[64];
	int nWidth = rect->Width();	
	int nHeight = rect->Height();
	CRect rct;
	int i;
	for (i = 0; i < 64; i ++)
	{
		if (m_bOver)
		{
			if (m_bFocus)
				brBk[i].CreateSolidBrush(RGB(255 - (i / 4), 255 - (i / 4), 255 - (i / 3)));
			else
				brBk[i].CreateSolidBrush(RGB(255 - (i / 4), 255 - (i / 4), 255 - (i / 5)));
		}
		else
		{
			if (m_bFocus)
				brBk[i].CreateSolidBrush(RGB(255 - (i / 3), 255 - (i / 3), 255 - (i / 4)));
			else
				brBk[i].CreateSolidBrush(RGB(255 - (i / 3), 255 - (i / 3), 255 - (i / 5)));
		}
	}

	for (i = rect->top; i <= nHeight + 2; i ++) 
	{
		rct.SetRect(rect->left, i, nWidth + 2, i + 1);
		pDC->FillRect(&rct, &brBk[((i * 63) / nHeight)]);
	}

	for (i = 0; i < 64; i ++)
		brBk[i].DeleteObject();
}

// 设置蒙板图片，显示不规则图片
void CMyButton::SetMaskBitmapId(int mask, bool action)
{
	IsMask = action;
	m_MaskBitmap.LoadBitmap(mask);
}

//绘制按钮的内边框
void CMyButton::DrawInsideBorder(CDC *pDC, CRect* rect)
{
	CPen *pLeft, *pRight, *pTop, *pBottom;

	if (m_bSelected && !m_bOver)
	{
		pLeft = & m_InsideBoundryPenLeftSel;
		pRight = &m_InsideBoundryPenRightSel;
		pTop = &m_InsideBoundryPenTopSel;
		pBottom = &m_InsideBoundryPenBottomSel;
	}
	else
	{
		pLeft = &m_InsideBoundryPenLeft;
		pRight = &m_InsideBoundryPenRight;
		pTop = &m_InsideBoundryPenTop;
		pBottom = &m_InsideBoundryPenBottom;
	}

	CPoint oldPoint = pDC->MoveTo(rect->left, rect->bottom - 1);
	CPen* pOldPen = pDC->SelectObject(pLeft);
	pDC->LineTo(rect->left, rect->top + 1);
	pDC->SelectObject(pRight);
	pDC->MoveTo(rect->right - 1, rect->bottom - 1);
	pDC->LineTo(rect->right - 1, rect->top);
	pDC->SelectObject(pTop);
	pDC->MoveTo(rect->left - 1, rect->top);
	pDC->LineTo(rect->right - 1, rect->top);
	pDC->SelectObject(pBottom);
	pDC->MoveTo(rect->left, rect->bottom);
	pDC->LineTo(rect->right - 1, rect->bottom);
	pDC->SelectObject(pOldPen);
	pDC->MoveTo(oldPoint);

	if (m_bSelected && !m_bOver)
		DrawFocusRect(pDC->m_hDC,rect);
}

void CMyButton::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class

	CButton::PreSubclassWindow();
	ModifyStyle(0, BS_OWNERDRAW);

}


// 设置按钮有效区域的样式
void CMyButton::SetRgnStyle(SYTLE nStyle)
{
	m_Style = nStyle;

	//设置按钮的有效区域(实现异型按钮)
	CRect rc;
	GetClientRect(&rc);


	// 设置有效区域
	// ROUNDRECT,ELLIPSE,UPTRIANGLE,DOWNTRIANGLE
	CRgn rgn;
	if(m_Style==ROUNDRECT) // 圆角矩形
	{
		rgn.CreateRoundRectRgn(rc.left,rc.top,rc.right,rc.bottom,5,5);

	}
	else if(m_Style==ELLIPSE)// 椭圆
	{
		rgn.CreateEllipticRgn(rc.left,rc.top,rc.right,rc.bottom);
		// AfxMessageBox("我是椭圆形");

	}
	else if(m_Style==UPTRIANGLE)// 上三角
	{
		CPoint ptArray[] ={CPoint(rc.left+rc.Width()/2,rc.top),
			CPoint(rc.left,rc.bottom),
			CPoint(rc.right,rc.bottom)};

		VERIFY(rgn.CreatePolygonRgn(ptArray, 3, ALTERNATE));

	}
	else if(m_Style==UPTRIANGLE)// 下三角
	{
		CPoint ptArray[] ={CPoint(rc.left,rc.top),
			CPoint(rc.right,rc.top),
			CPoint(rc.left+rc.Width()/2,rc.bottom)};

		VERIFY(rgn.CreatePolygonRgn(ptArray, 3, ALTERNATE));
	}

	int nRes = SetWindowRgn(rgn,TRUE);
	if (nRes==0)
	{
		AfxMessageBox(_T("设置形状不成功呢"));
	}
	rgn.DeleteObject();
}

// 设定按钮各种状态的图片ID
void CMyButton::SetBitmapId(int nOver,int nNormal,int nPressed,int nFocus)
{
	if(m_NormalBitmap.m_hObject)
	{
		m_NormalBitmap.DeleteObject();
	}
	if(m_PressedBitmap.m_hObject)
	{
		m_PressedBitmap.DeleteObject();
	}
	if(m_FocusBitmap.m_hObject)
	{
		m_FocusBitmap.DeleteObject();
	}
	if(m_OverBitmap.m_hObject)
	{
		m_OverBitmap.DeleteObject();
	}

	m_NormalBitmap.LoadBitmap(nNormal);
	m_PressedBitmap.LoadBitmap(nPressed);
	m_FocusBitmap.LoadBitmap(nFocus);
	m_OverBitmap.LoadBitmap(nOver);
}


//从一副位图的不透明的像素中创建一个区域
HRGN CMyButton::BitmapToRegion(HBITMAP hBmp, COLORREF cTransparentColor, COLORREF cTolerance)
{
	HRGN hRgn = NULL;

	if (hBmp)
	{
		// Create a memory DC inside which we will scan the bitmap content
		HDC hMemDC = CreateCompatibleDC(NULL);
		if (hMemDC)
		{
			// Get bitmap size
			BITMAP bm;
			GetObject(hBmp, sizeof(bm), &bm);

			// Create a 32 bits depth bitmap and select it into the memory DC 
			BITMAPINFOHEADER RGB32BITSBITMAPINFO = {
				sizeof(BITMAPINFOHEADER),	// biSize 
				bm.bmWidth,					// biWidth; 
				bm.bmHeight,				// biHeight; 
				1,							// biPlanes; 
				32,							// biBitCount 
				BI_RGB,						// biCompression; 
				0,							// biSizeImage; 
				0,							// biXPelsPerMeter; 
				0,							// biYPelsPerMeter; 
				0,							// biClrUsed; 
				0							// biClrImportant; 
			};
			VOID * pbits32; 
			HBITMAP hbm32 = CreateDIBSection(hMemDC,
				(BITMAPINFO *)&RGB32BITSBITMAPINFO, DIB_RGB_COLORS, &pbits32, NULL, 0);
			if (hbm32)
			{
				HBITMAP holdBmp = (HBITMAP)SelectObject(hMemDC, hbm32);

				// Create a DC just to copy the bitmap into the memory DC
				HDC hDC = CreateCompatibleDC(hMemDC);
				if (hDC)
				{
					// Get how many bytes per row we have for the bitmap bits (rounded up to 32 bits)
					BITMAP bm32;
					GetObject(hbm32, sizeof(bm32), &bm32);
					while (bm32.bmWidthBytes % 4)
						bm32.bmWidthBytes++;

					// Copy the bitmap into the memory DC
					HBITMAP holdBmp = (HBITMAP)SelectObject(hDC, hBmp);
					BitBlt(hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, hDC, 0, 0, SRCCOPY);

					// For better performances, we will use the ExtCreateRegion() function to create the
					// region. This function take a RGNDATA structure on entry. We will add rectangles by
					// amount of ALLOC_UNIT number in this structure.
#define ALLOC_UNIT	100
					DWORD maxRects = ALLOC_UNIT;
					HANDLE hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects));
					RGNDATA *pData = (RGNDATA *)GlobalLock(hData);
					pData->rdh.dwSize = sizeof(RGNDATAHEADER);
					pData->rdh.iType = RDH_RECTANGLES;
					pData->rdh.nCount = pData->rdh.nRgnSize = 0;
					SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);

					// Keep on hand highest and lowest values for the "transparent" pixels
					BYTE lr = GetRValue(cTransparentColor);
					BYTE lg = GetGValue(cTransparentColor);
					BYTE lb = GetBValue(cTransparentColor);
					BYTE hr = min(0xff, lr + GetRValue(cTolerance));
					BYTE hg = min(0xff, lg + GetGValue(cTolerance));
					BYTE hb = min(0xff, lb + GetBValue(cTolerance));

					// Scan each bitmap row from bottom to top (the bitmap is inverted vertically)
					BYTE *p32 = (BYTE *)bm32.bmBits + (bm32.bmHeight - 1) * bm32.bmWidthBytes;
					for (int y = 0; y < bm.bmHeight; y++)
					{
						// Scan each bitmap pixel from left to right
						for (int x = 0; x < bm.bmWidth; x++)
						{
							// Search for a continuous range of "non transparent pixels"
							int x0 = x;
							LONG *p = (LONG *)p32 + x;
							while (x < bm.bmWidth)
							{
								BYTE b = GetRValue(*p);
								if (b >= lr && b <= hr)
								{
									b = GetGValue(*p);
									if (b >= lg && b <= hg)
									{
										b = GetBValue(*p);
										if (b >= lb && b <= hb)
											// This pixel is "transparent"
											break;
									}
								}
								p++;
								x++;
							}

							if (x > x0)
							{
								// Add the pixels (x0, y) to (x, y+1) as a new rectangle in the region
								if (pData->rdh.nCount >= maxRects)
								{
									GlobalUnlock(hData);
									maxRects += ALLOC_UNIT;
									hData = GlobalReAlloc(hData, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), GMEM_MOVEABLE);
									pData = (RGNDATA *)GlobalLock(hData);
								}
								RECT *pr = (RECT *)&pData->Buffer;
								SetRect(&pr[pData->rdh.nCount], x0, y, x, y+1);
								if (x0 < pData->rdh.rcBound.left)
									pData->rdh.rcBound.left = x0;
								if (y < pData->rdh.rcBound.top)
									pData->rdh.rcBound.top = y;
								if (x > pData->rdh.rcBound.right)
									pData->rdh.rcBound.right = x;
								if (y+1 > pData->rdh.rcBound.bottom)
									pData->rdh.rcBound.bottom = y+1;
								pData->rdh.nCount++;

								// On Windows98, ExtCreateRegion() may fail if the number of rectangles is too
								// large (ie: > 4000). Therefore, we have to create the region by multiple steps.
								if (pData->rdh.nCount == 2000)
								{
									HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
									if (hRgn)
									{
										CombineRgn(hRgn, hRgn, h, RGN_OR);
										DeleteObject(h);
									}
									else
										hRgn = h;
									pData->rdh.nCount = 0;
									SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
								}
							}
						}

						// Go to next row (remember, the bitmap is inverted vertically)
						p32 -= bm32.bmWidthBytes;
					}

					// Create or extend the region with the remaining rectangles
					HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
					if (hRgn)
					{
						CombineRgn(hRgn, hRgn, h, RGN_OR);
						DeleteObject(h);
					}
					else
						hRgn = h;

					// Clean up
					GlobalFree(hData);
					SelectObject(hDC, holdBmp);
					DeleteDC(hDC);
				}

				DeleteObject(SelectObject(hMemDC, holdBmp));
			}

			DeleteDC(hMemDC);
		}
	}

	return hRgn;

}
// 设置位图转成有效区域
void CMyButton::SetRgnMask(int nMaskBmpId, bool nAction)
{
	CBitmap bmp;
	HRGN rgn;
	IsMaskRgn = nAction;
	bmp.LoadBitmap(nMaskBmpId);
	rgn = BitmapToRegion((HBITMAP)bmp,RGB(255,255,255));

	if (IsMaskRgn==TRUE)
	{
		SetWindowRgn(rgn,TRUE);
	}
}
void CMyButton::SetBackBmp(int nBgdBmpId,CRect rect)
{
	IsBackBmp = TRUE;
	BackRect = rect;
	m_BackBitmap.LoadBitmap(nBgdBmpId);
}


void CMyButton::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (!m_bTracking)
	{
		TRACKMOUSEEVENT tme;
		tme.cbSize = sizeof(tme);
		tme.hwndTrack = m_hWnd;
		tme.dwFlags = TME_LEAVE | TME_HOVER;
		tme.dwHoverTime = 1;
		m_bTracking = _TrackMouseEvent(&tme);
	}
	CButton::OnMouseMove(nFlags, point);
}
LRESULT CMyButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
	m_bOver = FALSE;         
	m_bTracking = FALSE;           //鼠标离开按钮       
	InvalidateRect(NULL, FALSE);  //让按钮重画
	return 0;
}

LRESULT CMyButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
	m_bOver = TRUE;  //鼠标盘旋在按钮上空
	InvalidateRect(NULL); //重画！
	return 0;
}