WTL对话框添加背景图片

WTL91_5321_Final + VS2013 + WIN7

// MainDlg.h : interface of the CMainDlg class
//
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include <GdiPlus.h>
#include <atlimage.h>
extern Gdiplus::GdiplusStartupInput gGdiInput;

class CMainDlg : public CDialogImpl<CMainDlg>
{
public:
	enum { IDD = IDD_MAINDLG };

	BEGIN_MSG_MAP(CMainDlg)
		MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)
		MESSAGE_HANDLER(WM_PAINT, OnPaint)
		COMMAND_ID_HANDLER(IDCANCEL, OnCancel)
	END_MSG_MAP()

// Handler prototypes (uncomment arguments if needed):
//	LRESULT MessageHandler(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
//	LRESULT CommandHandler(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
//	LRESULT NotifyHandler(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/)

	LRESULT OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
	LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
	LRESULT OnCancel(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/);
private:
	CImage bg;
};

1、对话框头文件（MainDlg.h）添加：

#include <GdiPlus.h>

extern Gdiplus::GdiplusStartupInput gGdiInput;

2、添加消息映射

MESSAGE_HANDLER(WM_PAINT, OnPaint)

LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);

3、对话框源文件（MainDlg.cpp）添加：

#pragma comment(lib, "GdiPlus.lib")

Gdiplus::GdiplusStartupInput gGdiInput;

ULONG token = 0;

OnInitDialog函数内进行Gdiplus初始化

GdiplusStartup(&token, &gGdiInput, NULL);

重载OnPaint消息响应函数：

LRESULT CMainDlg::OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
	CPaintDC dc(m_hWnd);
	RECT rect;
	GetClientRect(&rect);
	HDC hDC = dc.m_hDC;
	Gdiplus::Graphics g(hDC);
	Gdiplus::Image im(_T("res/green.jpg"));
	g.DrawImage(&im, 0, 0, rect.right - rect.left, rect.bottom - rect.top);
	return TRUE;
}

关闭：

Gdiplus::GdiplusShutdown(token);

// MainDlg.cpp : implementation of the CMainDlg class
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "resource.h"

#include "MainDlg.h"
#include "table.h"
#pragma comment(lib, "GdiPlus.lib")
Gdiplus::GdiplusStartupInput gGdiInput;
ULONG token = 0;

LRESULT CMainDlg::OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
	// center the dialog on the screen
	CenterWindow();

	// set icons
	HICON hIcon = AtlLoadIconImage(IDR_MAINFRAME, LR_DEFAULTCOLOR, ::GetSystemMetrics(SM_CXICON), ::GetSystemMetrics(SM_CYICON));
	SetIcon(hIcon, TRUE);
	HICON hIconSmall = AtlLoadIconImage(IDR_MAINFRAME, LR_DEFAULTCOLOR, ::GetSystemMetrics(SM_CXSMICON), ::GetSystemMetrics(SM_CYSMICON));
	SetIcon(hIconSmall, FALSE);

	GdiplusStartup(&token, &gGdiInput, NULL);

	//CTable table;

	return TRUE;
}

LRESULT CMainDlg::OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
	CPaintDC dc(m_hWnd);
	RECT rect;
	GetClientRect(&rect);
	HDC hDC = dc.m_hDC;
	Gdiplus::Graphics g(hDC);
	Gdiplus::Image im(_T("res/green.jpg"));
	g.DrawImage(&im, 0, 0, rect.right - rect.left, rect.bottom - rect.top);
	return TRUE;
}

LRESULT CMainDlg::OnCancel(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
{
	bg.Destroy();
	Gdiplus::GdiplusShutdown(token);
	EndDialog(wID);
	return 0;
}

参考于：

http://blog.csdn.net/faithzzf/article/details/51897140