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