C / C++ / MFC

<br />
IMPLEMENT_DYNAMIC(ImageViewer, CDialog)<br />
<br />
ImageViewer::ImageViewer(CWnd* pParent /*=NULL*/)<br />
	: CDialog(ImageViewer::IDD, pParent)<br />
{<br />
}<br />
<br />
ImageViewer::~ImageViewer()<br />
{<br />
}<br />
<br />
void ImageViewer::DoDataExchange(CDataExchange* pDX)<br />
{<br />
	CDialog::DoDataExchange(pDX);<br />
	DDX_Control(pDX, IDC_CAM1_IMG, m_nCam1img);<br />
	DDX_Control(pDX, IDOK, m_ok);<br />
	DDX_Control(pDX, IDCANCEL, m_canc);<br />
}<br />
<br />
<br />
BEGIN_MESSAGE_MAP(ImageViewer, CDialog)<br />
END_MESSAGE_MAP()<br />
<br />
BOOL ImageViewer::OnInitDialog() <br />
{<br />
	CDialog::OnInitDialog();<br />
		<br />
	return TRUE;  // return TRUE unless you set the focus to a control<br />
	              // EXCEPTION: OCX Property Pages should return FALSE<br />
}<br />
<br />
// ImageViewer message handlers<br />
void ImageViewer::showPicture()<br />
{<br />
	CPaintDC dc(this); // device context for painting<br />
<br />
	HBITMAP bmpHandle = (HBITMAP)LoadImage(NULL,<br />
		                               "cat.bmp",//strPictureName,<br />
					       IMAGE_BITMAP,<br />
					       0,<br />
					       0,<br />
							 LR_LOADFROMFILE|LR_CREATEDIBSECTION|LR_DEFAULTSIZE);<br />
					       //LR_LOADFROMFILE);<br />
	CBitmap bmpPicture;<br />
	CDC mdcPicture;<br />
	CBitmap *bmpFromHandle = bmpPicture.FromHandle(bmpHandle);<br />
<br />
	CRect rctPicture;<br />
	m_nCam1img.GetWindowRect(&rctPicture);<br />
		<br />
	mdcPicture.CreateCompatibleDC(&dc);<br />
	CBitmap * bmpPrevious = mdcPicture.SelectObject(bmpFromHandle);<br />
	ScreenToClient(&rctPicture);<br />
<br />
	dc.BitBlt(rctPicture.left, rctPicture.top,<br />
		  rctPicture.Width(), rctPicture.Height(),<br />
		  &mdcPicture, 0, 0, SRCCOPY);<br />
<br />
	DeleteObject(bmpHandle);<br />
	<br />
}<br />

ImageViewer dlgIM;
 
dlg.DoModal();  // <-- Window Valid Here, OnInitDialog() Will Get Called
 
dlg.showPicture();  // <-- Window <code>Not</code> Valid Here, Will Be Destroyed Before DoModal() Returns

<br />
void CCameraDataGenTxApp::OnImageViewer()<br />
{<br />
	ImageViewer *imgViewDlg;<br />
	imgViewDlg = new ImageViewer();<br />
	imgViewDlg->Create(IDD_IMAGEVIEWER, NULL);<br />
	imgViewDlg->SetWindowPos(NULL, 0, 0, 620, 390, SWP_NOMOVE);<br />
	imgViewDlg->ShowWindow(SW_SHOW);<br />
}<br />

<br />
BEGIN_MESSAGE_MAP(CCameraDataGenTxApp, CWinApp)<br />
	ON_COMMAND(ID_APP_ABOUT, &CCameraDataGenTxApp::OnAppAbout)<br />
	// Standard file based document commands<br />
	ON_COMMAND(ID_FILE_NEW, &CWinApp::OnFileNew)<br />
	ON_COMMAND(ID_CAMERA, &CCameraDataGenTxApp::OnCamera1Tx)<br />
	ON_COMMAND(ID_IMGVIEWER, &CCameraDataGenTxApp::OnImageViewer)<br />
	ON_COMMAND(ID_FILE_OPEN, &CWinApp::OnFileOpen)<br />
END_MESSAGE_MAP()<br />

<br />
it crashes and gives this error:<br />
Debug Assertion Failed!<br />
Program: c:\..\test.exe<br />
File: f:\..\ship\atlmfc\src\mfc\wingdi.cpp<br />
Line: 1090<br />
<br />
Press retry to debug application<br />
<br />
When I press re-try it goes to this code:<br />
<br />
ASSERT(::IsWindow(pWnd->m_hWnd));<br />

<br />
CPaintDC::CPaintDC(CWnd* pWnd)<br />
{<br />
ASSERT_VALID(pWnd);<br />
ASSERT(::IsWindow(pWnd->m_hWnd));<br />
<br />
if (!Attach(::BeginPaint(m_hWnd = pWnd->m_hWnd, &m_ps)))<br />
AfxThrowResourceException();<br />
}<br />

#include "shlwapi.h"

TCHAR szDir[20];

_tcscpy( szDir,_T("D:\\MyNewDir\\") );

if(!PathFileExists(szDir))<font color=green>//the directory already exists</font>
   if( CreateDirectory(szDir,NULL) )
         <font color=green>//MessageBox(NULL,_T("Created"),NULL,MB_OK);</font>

<br />
int ret;<br />
<br />
char buf[ ] = "C:\\A\\B"; <br />
char *lpStr;<br />
lpStr = buf;<br />
ret = PathFileExists(lpStr);<br />
if(ret == 1)<br />
{<br />
   CreateDirectory(lpStr,NULL);    <br />
}

Suresh H wrote:

How to link shlwapi.lib file to code ???

#include <shlwapi.h>
#pragma comment(lib, "shlwapi.lib")