WTL自画按钮与文件对话框（迁移2011-01-14）

//////////////WTL自画按钮/////////////////  
class CBmpEixtBtn : public CBitmapButtonImpl<CBmpEixtBtn>  
{  
public:  
    DECLARE_WND_SUPERCLASS(_T("WTL_BmpBtn"), GetWndClassName())  
    // added border style (auto3d_single)  
    CBmpEixtBtn(DWORD dwExtendedStyle = BMPBTN_AUTOSIZE /*| BMPBTN_AUTO3D_SINGLE*/, HIMAGELIST   
hImageList = NULL) :   
        CBitmapButtonImpl<CBmpEixtBtn>(dwExtendedStyle, hImageList)  
    { }  
    BEGIN_MSG_MAP(CBmpEixtBtn)  
        CHAIN_MSG_MAP(CBitmapButtonImpl<CBmpEixtBtn>)  
    END_MSG_MAP()  
    // override of CBitmapButtonImpl DoPaint(). Adds fillrect  
    void DoPaint(CDCHandle dc)  
    {  
        // added by SoftGee to resolve image artifacts  
        BITMAP bmp ;  
        CBitmap bitmap ;  
        bitmap.LoadBitmapW(IDB_BITMAP1) ;  
        bitmap.GetBitmap(&bmp) ;  
        //CPaintDC dc(this->m_hWnd) ;       
        CDC dcImage ;  
        dcImage.CreateCompatibleDC(dc.m_hDC) ;  
        HBITMAP hBitmapOld = dcImage.SelectBitmap(bitmap.m_hBitmap) ;  
        dc.StretchBlt(0,0, 80, 25, dcImage.m_hDC,0,0,bmp.bmWidth,bmp.bmHeight,SRCCOPY) ;  
        bitmap.DeleteObject() ;  
        dcImage.DeleteDC() ;  
        // call ancestor DoPaint() method  
        CBitmapButtonImpl<CBmpEixtBtn>::DoPaint(dc);  
    }  
}; 

在OnInitDialog里面:

CBmpEixtBtn m_exitBtn;  
m_exitBtn.SubclassWindow(GetDlgItem(IDC_BUTTON1)); 

//////////////////WTL文件对话框///////////////////  
CEdit m_edit;  
m_edit.Attach(GetDlgItem(IDC_EDIT1));  
TCHAR szDir[MAX_PATH];    
BROWSEINFO bi;  
ITEMIDLIST *pidl;  
bi.hwndOwner = this->m_hWnd;  
bi.pidlRoot = NULL;  
bi.pszDisplayName = szDir;  
bi.lpszTitle = L"请选择目录";  
bi.ulFlags = BIF_RETURNONLYFSDIRS;  
bi.lpfn = NULL;  
bi.lParam = 0;  
bi.iImage = 0;  
pidl = SHBrowseForFolder(&bi);  
if(pidl == NULL)  
    return 0;  
if(!SHGetPathFromIDList(pidl, szDir))  
    return 1;  
m_edit.SetWindowTextW(szDir);