如果我们自画了一个有背景的对话框，static控件在上面不透明是很不爽的。 改进方法很简单，从MFC的CStatic派生一个类，下面是相应的代码： （使用的时候修改控件ID为其他值，不要是IDC_STATIC，否则不能添加用于ddx的变量）    
//=========================================================
//
// Copyright (c) 2000-2004  iWise Technologies，Co. Ltd.
// All Rights Reserved.
//
// Class: CTransparentStatic //
// Product: iW988
// File   : TransparentStatic.h
// Author : 天衣有缝 // Created: 2004.12.29 23:40
// 
// Description:
//     ValueAdded main program for iW988.
//                   Contact:ShenZhen @ GuangDong
//                       waterpub@{域名已经过期}
//
//=========================================================
#pragma once
// CTransparentStatic

class CTransparentStatic : public CStatic
{
    DECLARE_DYNAMIC(CTransparentStatic)

public:
    CTransparentStatic();
    virtual ~CTransparentStatic();

protected:
    DECLARE_MESSAGE_MAP()
public:
    afx_msg void OnPaint();
};

//=========================================================
//
// Copyright (c) 2000-2004  iWise Technologies，Co. Ltd.
// All Rights Reserved.
//
// Class: CTransparentStatic //
// Product: iW988
// File   : TransparentStatic.cpp
// Author : 天衣有缝 // Created: 2004.12.29 23:40
// 
// Description:
//     ValueAdded main program for iW988.
//                   Contact:ShenZhen @ GuangDong
//                       waterpub@{域名已经过期}
//
//=========================================================

// TransparentStatic.cpp : implementation file

//



#include "stdafx.h" 

#include "TransparentStatic.h" 



// CTransparentStatic



IMPLEMENT_DYNAMIC(CTransparentStatic, CStatic)

CTransparentStatic::CTransparentStatic()

{

}



CTransparentStatic::~CTransparentStatic()

{

}



BEGIN_MESSAGE_MAP(CTransparentStatic, CStatic)

	ON_WM_PAINT()

END_MESSAGE_MAP()



// CTransparentStatic message handlers



void CTransparentStatic::OnPaint()

{

	CPaintDC dc(this); // 控件的设备文件



	// 取得位置

	CRect client_rect;

	GetClientRect(client_rect);



	// 取得文本

	CString szText;

	GetWindowText(szText);



	// 取得字体，并选入设备文件

	CFont *pFont, *pOldFont;

	pFont = GetFont();

	pOldFont = dc.SelectObject(pFont);



	// 用透明背景填充设备文件

	dc.SetBkMode(TRANSPARENT);



	// 显示文字

	dc.DrawText(szText, client_rect, 0);



	// 清除字体

	dc.SelectObject(pOldFont);



}


  

转载请注意：

下面的背景对话框是从CButtonST整理二来，版权属于：Davide Calabro' davide_calabro@{域名已经过期}

//=========================================================
//
// Copyright (c) 2000-2004  iWise Technologies，Co. Ltd.
// All Rights Reserved.
//
// Class: CBkDialogST//
// Product: iW988
// File   : BkDialogST.h
// Author : 天衣有缝// Created: 2004.12.29 23:50//  
// Description:
//     ValueAdded main program for iW988.
//                   Contact:ShenZhen @ GuangDong
//                       waterpub@{域名已经过期}
//
//========================================================= #pragma once 



class CBkDialogST : public CDialog

{

public:

	CBkDialogST(CWnd* pParent = NULL);				// 标准构造函数

	CBkDialogST(UINT uResourceID, CWnd* pParent = NULL);

	CBkDialogST(LPCTSTR pszResourceID, CWnd* pParent = NULL);

	virtual ~CBkDialogST();						// 析构



	DWORD SetMode(BYTE byMode, BOOL bRepaint = TRUE);		// 设置背景位图显示模式



	DWORD SetBitmap(HBITMAP hBitmap);				// 设置背景位图

	DWORD SetBitmap(int nBitmap);					// 设置背景位图



	DWORD ActivateEasyMoveMode(BOOL bActivate);			// 客户区可以随意拖动

	DWORD ShrinkToFit(BOOL bRepaint = TRUE);			// 使对话框只显示一个背景位图大小，左上角位置不变



	enum	{							// 背景位图显示模式

			BKDLGST_MODE_TILE	,				// 平铺

			BKDLGST_MODE_CENTER	,				// 居中

			BKDLGST_MODE_STRETCH	,				// 拉伸

			BKDLGST_MODE_TILETOP	,				// 只平铺一行，top

			BKDLGST_MODE_TILEBOTTOM	,				// 只平铺一行，bottom

			BKDLGST_MODE_TILELEFT	,				// 只平铺一列，left

			BKDLGST_MODE_TILERIGHT	,				// 只平铺一列，right

			BKDLGST_MODE_TOPLEFT	,				// 只显示一图：top left

			BKDLGST_MODE_TOPRIGHT	,				// 只显示一图：top right

			BKDLGST_MODE_TOPCENTER	,				// 只显示一图：top center

			BKDLGST_MODE_BOTTOMLEFT	,				// 只显示一图：bottom left

			BKDLGST_MODE_BOTTOMRIGHT,				// 只显示一图：bottom right

			BKDLGST_MODE_BOTTOMCENTER,				// 只显示一图：bottom center



			BKDLGST_MAX_MODES

		};



	enum	{

			BKDLGST_OK		,				// 函数设置成功

			BKDLGST_INVALIDRESOURCE	,				// 无效的位图资源

			BKDLGST_INVALIDMODE				         // 无效的显示模式

		};



protected:

	//{{AFX_MSG(CBkDialogST)

	afx_msg BOOL OnEraseBkgnd(CDC* pDC);

	afx_msg void OnSize(UINT nType, int cx, int cy);

	//}}AFX_MSG

	virtual void DoDataExchange(CDataExchange* pDX);		 // DDX/DDV 支持

	virtual void OnPostEraseBkgnd(CDC* pDC);			 // 扩展功能

	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);		 // 支持鼠标拖动对话框



	static short GetVersionI()		{return 11;}	 // 程序版本

	static LPCTSTR GetVersionC()	{return (LPCTSTR)_T("1.1");}// 程序版本



private:

	void Init();

	void FreeResources(BOOL bCheckForNULL = TRUE);



	HBITMAP		m_hBitmap		; // 位图句柄Handle to bitmap

	DWORD		m_dwWidth		; // 位图宽度

	DWORD		m_dwHeight		; // 位图高度

	BYTE		m_byMode		; // 当前显示模式

	BOOL		m_bEasyMoveMode		; // 是否可用鼠标拖动对话框



	DECLARE_MESSAGE_MAP()

};

  
//=========================================================
//
// Copyright (c) 2000-2004  iWise Technologies，Co. Ltd.
// All Rights Reserved.
//
// Class: CBkDialogST//
// Product: iW988
// File   : BkDialogST.cpp
// Author : 天衣有缝// Created: 2004.12.29 23:50
//  
// Description:
//     ValueAdded main program for iW988.
//                   Contact:ShenZhen @ GuangDong
//                       waterpub@{域名已经过期}
//
//=========================================================  
#include "stdafx.h" 

#include "BkDialogST.h" 



CBkDialogST::CBkDialogST(CWnd* pParent /*=NULL*/)

{

	Init();

}



CBkDialogST::CBkDialogST(UINT uResourceID, CWnd* pParent)

	: CDialog(uResourceID, pParent)

{

	Init();

}





CBkDialogST::CBkDialogST(LPCTSTR pszResourceID, CWnd* pParent)

	: CDialog(pszResourceID, pParent)

{

	Init();

}



CBkDialogST::~CBkDialogST()

{

	FreeResources();

}



void CBkDialogST::DoDataExchange(CDataExchange* pDX)

{

	CDialog::DoDataExchange(pDX);

}



BEGIN_MESSAGE_MAP(CBkDialogST, CDialog)

	ON_WM_ERASEBKGND()

	ON_WM_SIZE()

	ON_WM_LBUTTONDOWN()

END_MESSAGE_MAP()



void CBkDialogST::Init()

{

	FreeResources(FALSE);



	// 默认的位图显示模式

	m_byMode = BKDLGST_MODE_TILE;



	// 客户区可以随意拖动窗口

	m_bEasyMoveMode = TRUE;

}



void CBkDialogST::FreeResources(BOOL bCheckForNULL)

{

	// 卸载资源

	if (bCheckForNULL == TRUE)

	{

		if (m_hBitmap)	::DeleteObject(m_hBitmap);

	}



	m_hBitmap = NULL;

	m_dwWidth = 0;

	m_dwHeight = 0;

}



void CBkDialogST::OnLButtonDown(UINT nFlags, CPoint point) 

{

	// 客户区可以随意拖动窗口

	if (m_bEasyMoveMode == TRUE)

	    PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x, point.y));

	

	CDialog::OnLButtonDown(nFlags, point);

}



DWORD CBkDialogST::ActivateEasyMoveMode(BOOL bActivate)

{

	// 设置是否可以随意拖动窗口

	m_bEasyMoveMode = bActivate;

	return BKDLGST_OK;

}



DWORD CBkDialogST::SetBitmap(int nBitmap)

{

	HBITMAP		hBitmap	= NULL;

	HINSTANCE	hInstResource	= NULL;



	// 找到位图资源的句柄

	hInstResource = AfxFindResourceHandle(MAKEINTRESOURCE(nBitmap), RT_BITMAP);



	// 加载位图

	hBitmap = (HBITMAP)::LoadImage(hInstResource, MAKEINTRESOURCE(nBitmap), IMAGE_BITMAP, 0, 0, 0);



	return SetBitmap(hBitmap);	// 调用下面的函数

}



DWORD CBkDialogST::SetBitmap(HBITMAP hBitmap)

{

	int	nRetValue;

	BITMAP	csBitmapSize;



	// 卸载资源

	FreeResources();



	if (hBitmap)

	{

		m_hBitmap = hBitmap;



		// 取得位图信息

		nRetValue = ::GetObject(hBitmap, sizeof(csBitmapSize), &csBitmapSize);

		if (nRetValue == 0)

		{

			// 无效的位图句柄

			FreeResources();

			return BKDLGST_INVALIDRESOURCE;

		}

		m_dwWidth = (DWORD)csBitmapSize.bmWidth;	// 位图宽度

		m_dwHeight = (DWORD)csBitmapSize.bmHeight;	// 位图高度

	}



	Invalidate();



	return BKDLGST_OK;

}



DWORD CBkDialogST::SetMode(BYTE byMode, BOOL bRepaint)

{

	if (byMode >= BKDLGST_MAX_MODES)	return BKDLGST_INVALIDMODE;



	// 设置位图显示模式

	m_byMode = byMode;



	if (bRepaint == TRUE)	Invalidate();



	return BKDLGST_OK;

}



DWORD CBkDialogST::ShrinkToFit(BOOL bRepaint)

{

	// 使对话框只显示一个背景位图大小，左上角位置不变

	CRect	rWnd;

	CRect	rClient;

	DWORD	dwDiffCX;

	DWORD	dwDiffCY;



	::GetWindowRect(m_hWnd, &rWnd);			// 相对于屏幕的位置

	::GetClientRect(m_hWnd, &rClient);		// 客户区相对于对话框左上角的位置



	dwDiffCX = rWnd.Width() - rClient.Width();	// 左右边框线宽度之和

	dwDiffCY = rWnd.Height() - rClient.Height();	// 对话框标题兰和下边框宽度之和



	m_byMode = BKDLGST_MODE_CENTER;			// 显示模式为居中一副图



	// 计算边框大小，再移动之，使客户区只显示一个位图大小

	MoveWindow(rWnd.left, rWnd.top, dwDiffCX + m_dwWidth, dwDiffCY + m_dwHeight, bRepaint);



	return BKDLGST_OK;

}



void CBkDialogST::OnSize(UINT nType, int cx, int cy) 

{

	CDialog::OnSize(nType, cx, cy);



	// 如果有位图资源则重画

	if (m_hBitmap != NULL)

	{

		Invalidate();

	}

}



void CBkDialogST::OnPostEraseBkgnd(CDC* pDC)

{

	// 留作扩展用

}



BOOL CBkDialogST::OnEraseBkgnd(CDC* pDC) 

{

	CRect		rWnd;

	int		nX			= 0;

	int		nY			= 0;



	BOOL	bRetValue = CDialog::OnEraseBkgnd(pDC);



	// 位图加载时才执行重画背景

	if (m_hBitmap)

	{

		GetClientRect(rWnd);		// 客户区位置，相对于对话框左上角



		CDC		dcMemoryDC;	// 目标图形设备

		CBitmap		bmpMemoryBitmap;  // 上面设备的位图

		CBitmap*	pbmpOldMemoryBitmap = NULL;



		dcMemoryDC.CreateCompatibleDC(pDC);			// 创建与设备文件兼容的内存图形设备

		bmpMemoryBitmap.CreateCompatibleBitmap(pDC, rWnd.Width(), rWnd.Height());

								// 用内存图形设备初始化这个内存位图

		pbmpOldMemoryBitmap = (CBitmap*)dcMemoryDC.SelectObject(&bmpMemoryBitmap);

								// 内存图形设备中选入这个位图

		dcMemoryDC.FillSolidRect(rWnd, pDC->GetBkColor());	// 填充背景色





		CDC		dcTempDC;		// 源图形设备，位图先选入之

		HBITMAP		hbmpOldTempBitmap = NULL;

		dcTempDC.CreateCompatibleDC(pDC);

		hbmpOldTempBitmap = (HBITMAP)::SelectObject(dcTempDC.m_hDC, m_hBitmap);



		switch (m_byMode)

		{

			case BKDLGST_MODE_TILE:

				// 平铺位图

				while (nY < rWnd.Height()) 

				{

					while(nX < rWnd.Width()) 

					{

						dcMemoryDC.BitBlt(nX, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

						nX += m_dwWidth;

					}

					nX = 0;

					nY += m_dwHeight;

				}

				break;

			case BKDLGST_MODE_CENTER:

				nX = ((rWnd.Width() - m_dwWidth)/2);

				nY = ((rWnd.Height() - m_dwHeight)/2);

				dcMemoryDC.BitBlt(nX, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_STRETCH:

				// 拉伸位图

				dcMemoryDC.StretchBlt(0, 0, rWnd.Width(), rWnd.Height(), &dcTempDC, 0, 0, m_dwWidth, m_dwHeight, SRCCOPY);

				break;

			case BKDLGST_MODE_TILETOP:

				while(nX < rWnd.Width()) 

				{

					dcMemoryDC.BitBlt(nX, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

					nX += m_dwWidth;

				}

				break;

			case BKDLGST_MODE_TILEBOTTOM:

				while(nX < rWnd.Width()) 

				{

					dcMemoryDC.BitBlt(nX, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

					nX += m_dwWidth;

				}

				break;

			case BKDLGST_MODE_TILELEFT:

				while (nY < rWnd.Height()) 

				{

					dcMemoryDC.BitBlt(0, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

					nY += m_dwHeight;

				}

				break;

			case BKDLGST_MODE_TILERIGHT:

				while (nY < rWnd.Height()) 

				{

					dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, nY, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

					nY += m_dwHeight;

				}

				break;

			case BKDLGST_MODE_TOPLEFT:

				dcMemoryDC.BitBlt(0, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_TOPRIGHT:

				dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_TOPCENTER:

				nX = ((rWnd.Width() - m_dwWidth)/2);

				dcMemoryDC.BitBlt(nX, 0, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_BOTTOMLEFT:

				dcMemoryDC.BitBlt(0, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_BOTTOMRIGHT:

				dcMemoryDC.BitBlt(rWnd.right - m_dwWidth, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

			case BKDLGST_MODE_BOTTOMCENTER:

				nX = ((rWnd.Width() - m_dwWidth)/2);

				dcMemoryDC.BitBlt(nX, rWnd.bottom - m_dwHeight, m_dwWidth, m_dwHeight, &dcTempDC, 0, 0, SRCCOPY);

				break;

		}



		pDC->BitBlt(0, 0, rWnd.Width(), rWnd.Height(), &dcMemoryDC, 0, 0, SRCCOPY);



		OnPostEraseBkgnd(&dcMemoryDC);



		::SelectObject(dcTempDC.m_hDC, hbmpOldTempBitmap);

		dcMemoryDC.SelectObject(pbmpOldMemoryBitmap);

	}



	return bRetValue;

}